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Office 365 and Central Exchange Services at CSU is the primary resource for faculty and staff to find information regarding Exchange and Office 365 services. If you have questions or if you are looking for information not listed here, please contact the CSU Central IT Help Desk at

News, Announcements, and Updates

8/14/2018 - Office 365 No Longer Supporting TLS 1.0 and 1.1 as of 10/31/2018: Starting October 31, 2018, Microsoft will be discontinuing support of TLS 1.0 and 1.1 for connecting to Office 365. We do not anticipate this having a major impact but users using older clients such as IE 10 or earlier on Windows 7 or Safari 6.0.4/OS X10.8.4 will not be able to connect to Office 365 services after 10/31. Please refer to Preparing for the mandatory use of TLS 1.2 in Office 365 for more information.

8/1/2018 - All New CSU eIDs Created with Office 365 E-mail Accounts: Starting August 1, 2018, any user registering for an eID will automatically be assigned an Office 365 mailbox. Prior to this change, faculty and staff eIDs were created with Office 365 mailboxes while applicants and undergrad students were provisioned with Google Apps (@rams) mailboxes. Refer to Email Accounts for more information about e-mail accounts at CSU.

7/9/2018 - Connecting to Office 365 Services will Require Office 365 ProPlus in October 2020: Microsoft has announced that starting October 13, 2020, it will be necessary to have Office 365 ProPlus or Office perpetual in mainstream support to connect to Office 365 services. Notably, Office 2016 will not be supported to connect to Office 365 Services after the October 2020 deadline. Microsoft is making this announcement well in advance so that IT support organizations have time to plan accordingly. Office ProPlus activated using Device Based Activation (DBA) is available to CSU departments wanting to make the change to Office ProPlus. Please refer to Office 365 ProPlus updates for more information about the announcement concerning Office 365 system requirements.

5/11/2018 - Office 365 Authenticated SMTP Limited to 3 Concurrent Connections: Microsoft announced that they are going to make a change on June 1 to restrict authenticated SMTP connections to to 3 concurrent connections. Please refer to Changes coming to the SMTP... for more details. This change does not affect clients/applications/printers configured to use CSU's locally-hosted SMTP service at

4/26/2018 - OWA Mobile Apps being Retired: The Microsoft OWA mobile apps (OWA for iPhone, OWA for iPad, and OWA for Android) will be retired as of May 15, 2018. Users leveraging OWA mobile apps should switch to Outlook for iOS or Outlook for Android. (Click for more details)

4/26/2018 - Microsoft Recommendation if Users Are Reporting Outlook for Mac Stability Issues : Microsoft has posted a recommendation that users use the most recent version of macOS and Office for Mac and stay current with subsequent updates - specifically is a user is reporting stability issues with their current setup. (Click for more details)

3/1/2018 - Office Device Based Activation: Microsoft is transitioning to a new method of Office deployment called Device Based Activation (DBA) that offers IT professionals at CSU a method to deploy the same version of Office currently available to CSU users using the Click to Run (C2R) option presented in the Office 365 Portal. Please refer to Device Based Activation for Office ProPlus for more information and installation instructions.

2/8/2018 - Microsoft Teams: Tools to manage Microsoft Teams for use in Office 365 are now available to resource coordinators. Please refer to Microsoft Teams for more information about creating and using teams.

10/18/2017 - Outlook 2007 No Longer Supported as of 10/31: Starting October 31, Microsoft will no longer support the RPC over HTTP protocol used by Outlook 2007 when connecting to Exchange Online. While Outlook 2007 will continue to work after October 31, the quality of the mail experience will decrease over time. Affected users should upgrade to Outlook 2010 or newer (Outlook 2016 is recommended) as soon as possible.

9/13/2017 - RESOLVED - Directory Data Problem: A backend data process caused issues with eID data that then filtered into several downstream systems including Active Directory and Office 365. ACNS and Information Systems staff identified the root cause and have fixed affected systems.

8/2/2017 - Self-Service Tool to Release Messages from Quarantine Available: Spam filtering in Office 365 is configured to quarantine e-mail considered to be "high confidence spam". Users can use the steps posted at Self-Service: Release Messages from Quarantine to view and release items from the Office 365 quarantine.

7/26/2017 - Planned Maintenance to Install Exchange 2016 Servers on 7/31/2017 from 6:00pm-11:00pm: ACNS Will be installing new Exchange 2016 servers in support of Office 365 backend services such as account provisioning and sub-domain e-mail routing on Monday, July 31 starting at 6:00pm. Because all Exchange mailboxes are hosted in Office 365, user access to e-mail services will not be affected. Although not expected, Outlook clients may notice updated AutoDiscover settings and prompt a user to accept or possibly need to be restarted.

6/16/2017 - New OneDrive for Business Sync Client Required After 9/12/2017: ACNS is planning to update sync settings affecting Office 365 OneDrive for Business on 9/12/17 that will disable syncing for users still using legacy sync clients. The new sync client has been available for install since Spring 2016 and the planned update is necessary to allow users to sync both SharePoint site libraries and OneDrive storage on their PCs. Please refer to Upgrade to New OneDrive Sync Client for more information.

5/22/2017 - Office 365 Modern Authentication: ACNS will enable the modern authentication option in Exchange Online and Skype for Business on 5/30/2017. Please refer to Office 365 Modern Authentication for more information.