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Office 365 Project

Known Issues

General Issues | Calendar Issues | Email Issues | Skype Issues

ITS is posting these "known issues" around the Office 365 upgrade: as issues are resolved, we will update this page. Contact us at to report issues you may be experiencing.

Last updated: June 21, 2017

* UPN or User Principal Name is the name of the user of a system in an email address format. The UPN consists of the user's name (username), separator (the @ symbol), and the domain name (UPN suffix). An example would be

In Office 365 email and calendaring, your UPN is (i.e.,

General Issues

  • Authentication Issues If you are using Office 2013 for Windows, Office 365 requires that your Office installation use Modern Authentication in order to successfully sign-in to the service. ITS recommends that users upgrade to Office 2016 as soon as they are able, but this downloadable registry patch will allow Office 2013 installations to function normally after your account has been migrated. It is also recommended that you apply any Office 2013 updates available through Microsoft Update for maximum compatibility. Users will need to have administrative rights on their machine to install this registry patch. Close Outlook 2013 or any other Office application, apply the patch, and then reboot your machine. If you need assistance, please contact your LSP or call the UVA Help Desk.
    If you would like more details about this issue, please see Microsoft's support article.
  • Users upgraded to Office 365 Outlook email and calendar cannot grant permissions to users who haven't been upgraded (i.e, still on Exchange) and vice versa.
  • Permissions are migrated and maintained during the upgrade to Office 365, but may not work until all objects (people, resources, shared accounts) are in the cloud (upgraded).

Calendar Issues

  • In Office 365, Microsoft has changed the way a Mac/Outlook user is able to view a shared calendar: In order for a Mac running Outlook to be able to access a shared calendar directly, the calendar must be shared with a minimum of Reviewer permissions. If sharing the calendar from Office 365 OWA, the equivalent to Reviewer is "Can view all details".
  • In OWA, for a user whose mailbox has not yet been upgraded to view the calendar of a user who has been upgraded to Office 365, the Office 365 user must send a sharing invite to the not-yet-upgraded user, who must open the invite email in OWA and click the “Add this calendar” link near the top of the email.
  • Users in one "location" (upgraded vs. not upgraded, cloud vs. on UVA servers) can't grant mail/calendar permissions to users in another location (i.e., upgraded users can't grant permissions to users who haven't been upgraded and vice versa).
  • Permissions are migrated and maintained during mailbox upgrade, but may not work until all objects (people, resources, shared accounts) are in the cloud (upgraded).

Email Issues

  • Anyone who accesses a shared mailbox that is in the cloud/upgraded to Office 365 must ensure that they enter their username in UPN — in order for shared mailbox/calendar to work. (This is because shared mailboxes are accessed as the user, and Office 365 requires UPN).
  • On Outlook for Mac, if shared mailboxes weren't initially set up using UPN, it's probably best to remove and re-add them.
  • Accessing shared mailboxes on mobile requires using IMAP to connect to the mailbox (and a special format for entering the username).
  • Office 365 OWA (Outlook Web App) cannot access shared mailboxes that have not been upgraded. This means you can't access non-upgraded shared mailboxes via OWA when your account has been upgraded and the shared mailboxes have not been upgraded.

Skype Issues

  • External Skype for Business users who have added UVA users as contacts will need to remove and re-add the UVA users after the migration.
  • Existing meetings that are scheduled for the future and are configured as Skype meetings will need to be recreated due to the change of SIP address.
  • The Skype for Business client is only compatible with OSX 10.11 and higher. Current users of Lync on Mac OSX 10.10 may continue to use the Lync client. It will connect to the Office 365 Skype for Business service until you upgrade to OSX 10.11 (El Capitan) or later which is compatible with Skype for Business. You will need to log in with your email address ( after the upgrade is complete.

  Page Updated: Wednesday 2017-06-21 14:09:08 EDT