FYI – you may not all be aware of the problems Microsoft are having globally with their online services. While it doesn’t affect desktop applications (Outlook, Word etc.) it does affect online systems (which includes the UC Exchange Server). Latest post from ITS:

Technology P2 Major Incident – Update 1
What’s happened? Users may be unable to access Outlook on the web.

Following the initial investigation, further information will be provided to affected users as soon as possible.
How does this affect me? The following impact scenarios may affect your users:
-Users may be unable to access Outlook on the web.
-The search feature may not be working in Exchange Online, and Microsoft Teams
-Recently uploaded files to Microsoft Teams may be temporarily inaccessible.

This does not affect any delivery of emails; they will work as normal. You can still access your emails through the Outlook Desktop application

What stage is the fix at, and when is the next update? At 1500 Microsoft started performing targeted restarts to restore access to the impacted services.

Access to Outlook on the web, and the other affected services will be gradually restored as these take effect.

Some users have reported their access to Outlook if working again.

Next email update: at or before 5.30pm

What should I do if I think I’m having a related problem? If you think you have a different or related issue, please contact the ITS Service Desk on 0508 824 843 or +6433695000 or visit the Assyst Portal to raise a ticket.

Who can I contact if I need more info? You can follow the ITS status page at https://status.canterbury.ac.nz/ for more regular updates.

Reference detail Classification: Priority 2
Incident Master ticket: 287287
Duty Incident Manager: Vera McLauchlan