Opening emails in Outlook takes 5-10s, sometimes makes Outlook not respond. Azure Virtual Desktop

Question

Opening emails in Outlook takes 5-10s, sometimes makes Outlook not respond. Azure Virtual Desktop

Sander 6

In our Azure Virtual desktop environment our end users noticed since recently that Outlook is responding very slowly. Opening mails takes 5-10s, it regularly displays not responding.

When creating a new user profile and logging in with one of the affected users it works normally.

We are using FSLogix profiles without Office containers.

Any suggestions as to what the problem could be?

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Answer 1

If Outlook is slow only for existing FSLogix profiles and works normally with a

new profile, the issue is almost always a corrupted FSLogix profile or a

bottleneck in the profile disk.

Check the following:

• FSLogix profile disk size (VHD/VHDX) – if it is large or fragmented, Outlook

becomes slow.

• Event Viewer → FSLogix → look for profile mount delays or I/O warnings.

• Storage performance of the profile share (latency > 10–15 ms causes Outlook

freezes).

• Antivirus scanning the VHDX file (very common cause).

If a new profile works fine, the quickest fix is:

Backup the user’s existing profile VHDX.
Create a fresh FSLogix profile.
Let Outlook rebuild its cache.

This resolves most Outlook performance issues in AVD with FSLogix.

Text and formatting in collaboration with Copilot.