Title of Service: The Oxford Nexus (Exchange) Service
Status of Document: This is version 2.2 and is dated 7 January 2014 and describes the Nexus Exchange 2010 service from January 2014.
The Oxford Nexus Service provides a suite of software applications to help users work collaboratively within groups. The suite includes: email, online calendar, shared documents, web pages, shared contact lists and other collaboration tools. The Oxford Nexus Service is built on the Microsoft Exchange 2010 and SharePoint 2010 platforms. The Service is available to all staff and students within the collegiate University.
This SLD describes the services available via the Nexus Exchange 2010 implementation. A corresponding SLD (<http://www.oucs.ox.ac.uk/internal/sld/sharepoint.xml>) describes the services available via the Nexus SharePoint service.
Users are allocated an initial storage quota of 2GB on the Exchange system. This is a 'hard' quota and is further described at <http://www.oucs.ox.ac.uk/email/quota/>. Users requiring an increase in their quota should contact the IT Services Help Centre, Banbury Road in the first instance. You may be asked to justify your request, or to confirm approval from your head of department, IT Support Officer or tutor. A discretionary increase in your quota allowance is unlikely to exceed 3GB. A chargeable 'premium' service is available for those users requiring additional quota in excess of the discretionary allowance. The service is authorised by, and charged to, the unit (department or college) rather than the end-user directly.
As with many services provided by IT Services, support is provided through a combination of IT Services and local IT support (ITSS). As the overall Oxford Nexus Service provider, IT Services may always be contacted by users about any aspect of the service.
The Oxford Nexus SLD indicates the primary user support path for the main elements of the Oxford Nexus Service. Primary support is generally provided by either IT Services or local IT support.
Where primary support is not expected to be provided by IT Services, and is, for example, the user's local ITSS then in many cases ITSS are able to instruct IT Services on behalf of the user. Users will generally be referred to IT Services for secondary support where primary support is provided by local IT support. In all cases, users may contact IT Services in the first instance about any aspect of the Oxford Nexus Service if they so choose. This may, for example, be the most efficient route to resolve most basic problems. In more complex cases IT Services may refer the user to their primary IT support or require the involvement of local IT support in order to resolve the issue.
2. Summary of IT Services’ responsibilities
2.1. Service availability
Hours of Service
The service operates at all times.
Oxford Nexus Service systems staff cover is normally available from 0900 to 1700 on working days. Minimal operational cover operates from 0830 to 2030 on working days. Automatic monitoring of the main service elements takes place outside these hours, and informal arrangements exist for staff to be called, but no funding is provided to make this contractual.
The IT Services help desk service currently operates 0830-2030 Monday-Friday all year round except for bank holidays and Christmas closure (approximately 24th December - 2nd January). Please see the IT Services/OUCS Help Centre SLD for further details of the Help Centre responsibilities, <http://www.oucs.ox.ac.uk/internal/sld/help.xml>.
If a fault is notified between 0900 and 1700 on a working day, IT Services will commence investigation within one hour (provided that no similar fault is also being handled by the same team).
If a fault is notified outside these hours, IT Services will use reasonable endeavours to rectify the fault, but no funding is allocated to this purpose.
The Oxford Nexus Service hardware is located in two physical locations within the Oxford network. Complete failure at one site should result in failover to the second site with minimal loss of service. Within each site components such as servers and storage have been deployed with resilience and business continuity in mind.
Hardware and Software Maintenance
The hardware on which the Oxford Nexus Service is hosted is supported by maintenance contracts from the relevant vendors.
Software updates are provided by the relevant vendor and applied by IT Services. Where possible the JANET maintenance period (Tuesdays, 0700-0900) is reserved for maintenance work that may affect service availability. Except in the case of emergency maintenance (e.g. security fixes), scheduled downtime will be advertised at least a week in advance.
Alternative facilities and migrations from local services
Some departments and colleges run their own Exchange or other email service. Where a unit wishes to migrate from their local service to Nexus IT Services will provide advice to departments and colleges on a reasonable efforts basis, including an initial assessment of the complexity and likely resources required to undertake any such migration, as well as providing supporting materials relating to the preferred methods of undertaking any migration process. However, no specific resources have been allocated for IT Services to undertake a migration from a department service to the Nexus Service or for enabling interoperability between Nexus and a local Exchange instance, for example. Departments wishing to migrate from a local service or who wish to use Nexus beyond the scope of the service defined in this SLD would be expected to commit the required resources to enable any IT Services support for such activities (where feasible). Some useful background information, including indicators of the level of support IT Services can provide to migrating units is described at <http://www.oucs.ox.ac.uk/nexus/itss/altmigrate.xml>. Departments seeking a hosting facility for their own Exchange or email service should contact NSMS in the first instance.
2.2. Administration information and support documentation
Information and support documentation
Support documentation for all aspects of the Oxford Nexus Service is provided online at <http://www.oucs.ox.ac.uk/nexus/>.
The IT Services IT Learning Programme provides a range of courses relevant to use of the Oxford Nexus Service, <http://www.oucs.ox.ac.uk/itlp/>.
Notification of major faults, service outage etc are circulated to the itss- email@example.com mailing list and placed on the IT Services Status website, <http://status.ox.ac.uk>.
Problems with the Service should be reported to the IT Services Help Centre, <http://www.oucs.ox.ac.uk/help/>, in the first instance where, if appropriate, the issue will be escalated to the Oxford Nexus Service team for specialist diagnostics and advice.
2.3. Service components
Nexus Account Administration
Account management is delegated to IT Services Registration services. The SLD for the Registration Service specifies the list of services offered <http://www.oucs.ox.ac.uk/internal/sld/registration.xml>. These include, but are not confined to:
Registered ITSS may make use of functionality supported by Registration Services to undertake a number of the above actions on behalf of their own users. In particular, ITSS can currently:
The following table outlines services or functionality provided to end users through Exchange where IT Services is expected to provide the primary means of support.
|Service||Description||Primary user support|
|IMAP, SMTP, POP3, ‘Outlook Anywhere’, Outlook Web Access (incl. OWA lite)||Standard Exchange services provided by the Nexus team.||IT Services|
|Quota usage||Enabling end-users to view quota usage.||IT Services|
|Out of office message||Automated email reply to indicate user away from email. Functionality is enabled/disabled by user.||IT Services|
|Spam scoring and filtering||Scoring of incoming mail via the Oxmails and filtering via Exchange.||IT Services|
|Blacklisting and Whitelisting||Safe senders may be specified by user||IT Services|
|Anti-virus||Virus checking at the Oxmails and at the Exchange servers||IT Services|
|Backup and recovery||Users may restore accidentally deleted items up to seven days after the event via the Exchange Restore Deleted Items functionality. After this period, restores are reliant on the backup service as provided by the HFS Backup and Archiving Service <http://www.oucs.ox.ac.uk/internal/sld/hfs.xml>. Backups are retained, primarily for the purpose of system restores. IT Services operates a chargeable service for the attempted recovery of user deleted items from system backups, <http://www.oucs.ox.ac.uk/services/recovery.xml>. Whole mailboxes may be restored to a specific historical date up to a maximum of 60 days ago, but this can be a minimum of 50 days depending on the mailbox’ place in the backup cycle. Beyond this point, mailbox backups are available at 11 day intervals, up to a minimum of 80 days and a maximum of 90 days in the past.||IT Services|
|Deleted Items and junk mail retention policy||IT Services purges items in users' Deleted Items and Junk Mail folders after 90 days but items are retained in 'Recover Deleted Items' (sometimes referred to as the "dumpster") for a further 7 days after purging.||IT Services|
|Resource booking||Provision of mailbox accounts to manage room and other resource bookings||IT Services|
|BlackBerry Enterprise Server hosting||Service provided for the benefit of BlackBerry hand held users.||IT Services|
|BlackBerry user creation||Creation of accounts||Provisioned by IT Services under instruction from ITSS|
|BlackBerry server administration||Deletions and suspension of accounts, policy setting, applying user licences.||Provisioned by IT Services under instruction from ITSS|
|BlackBerry support documentation||Primarily the responsibility of IT Services, with departmental/college-specific information (including contractual information) the responsibility of ITSS.||IT Services|
Exchange Client Support
For Exchange client support the first port of call for documentation is the IT Services/OUCS web site <http://www.oucs.ox.ac.uk/nexus/>.
|Service||Description||Primary user support|
|Email client documentation||IT Services maintains documentation on a selection of clients for use with Exchange. These include Microsoft Outlook (via Outlook Anywhere), clients using Exchange Web Services, mobile email clients and at least one IMAP client.||IT Services|
|Training||IT Services IT Learning Programme provides training for group working as well as training in the most effective use of selected clients.||IT Services|
Inactive mailbox retention period
The Nexus mailboxes associated with those whose University Card has expired (or status changed so that they are no longer eligible for a Nexus mailbox) are not deleted immediately. The following procedure is followed:
Shared mailbox logging
Mailboxes that are shared using the privileges of Full Access have 'mailbox auditing' logs switched on by default, with the exception of resource mailboxes (used for room bookings etc.). Audit logs enable better support for shared mailboxes (e.g. identifying the cause of missing items) and ensure that in the event of a security incident associated with the mailbox there is a record of access to, and activity within, the mailbox. Logs are not routinely analysed and are only ever accessed either in order to provide support, with the permission of the mailbox owner, or as part of an investigation arising from a security incident (in line with the University's IT Regulations).
Logs which are created by the Exchange system are kept for around 90 days under normal circumstances. This includes the mailbox audit logs (see 'Shared mailbox logging', above) which log in a 90-day 'circular' fashion. (See also 'Backup and recover' above for the retention times for mailbox backups).
3. Summary of client’s responsibilities
The client's responsibilities vary according to the type of service. Clients in this context may be department or college IT Support Staff or individual end-users.
The following table lists services provided by, or related to, the Oxford Nexus Service but where it is expected that the primary means of support to the end-user will be provided by local IT support or similar.
|Service||Description||Primary user support|
|Distribution lists||These are managed by the user/owner within the user-visible Microsoft Exchange interfaces.||ITSS|
|Personal calendars||Standard personal calendars within Exchange||ITSS|
|Shared calendars||Calendars within Exchange to be shared with and/or administered by multiple individuals or groups.||ITSS|
|Delegated access to email and/or calendars||Users may choose to delegate access to their mailbox and/or calendar to other authorised users (e.g. PA, ITSS).||ITSS|
Exchange client support
|Service||Description||Primary user support|
|Email client maintenance||On departmental and college owned machines||ITSS|
|Email client maintenance||On privately owned machines||User (in conjunction with IT Services support documentation for recommended clients)|
|Email signatures||The placement of signatures at the bottom of users’ email||ITSS|
|BlackBerry purchase||Purchasing of the individual devices.||Department or college|
|BlackBerry contracts with service providers||Contracts and payments to carriers (e.g. Vodafone, O2, Orange etc.)||Department or college|
|BlackBerry CAL||Blackberry Enterprise Server user licence.||Department or college|
|Mobile device client configuration||Enabling BlackBerry or other mobile devices to interoperate with Exchange||ITSS|
|Wiping of data from mobile device||Remote removal of data from mobile device following loss||ITSS|
|Trans-migration training||Training before, during and shortly after the migration of units to and from Nexus||IT Services provides generic training; department or college responsible where on-site, customised training required|
|Bespoke training||Customised training to meet specific local requirements||Department or college|
The use of the Oxford Nexus Exchange Service is subject to, and implies, acceptance of any applicable regulations, including but not limited to:
In general, users are expected to:
Users are encouraged to:
4. Premium services