Who is this article for?

Mail Manager Auto Discovery stops working after a large folder structure change.

Some administrator permissions might be required.

Mail Manager AutoDiscovery may stop working unexpectedly in versions 15.1 or 15.2 when you change 100 or more folders.

Identifying the issue

This issue affects Mail Manager versions 15.1 and 15.2. You may experience the following symptoms:

• AutoDiscovery stops working unexpectedly after changing 100 or more folders
• AutoDiscovery works in the testing tool and performance checker
• Some collections work and discover correctly, whilst others do not

Understanding the cause

The default AutoDiscovery rule for updating locations was accidentally changed to value 4:

Note: Value 4 is defined as AddUpdateAndRemoveIfMax100Missing, which only proceeds if the number of missing locations is 100 or fewer.

The correct setting should be value 1, which adds, updates, and removes if more than 0 discovered (only proceeds if at least one location was discovered).

Resolving the issue

To correct the AutoDiscovery rule:

1. Go to your Shared Configuration Folder.
2. Open AdminEmailFiling.cfg with Notepad.
3. Add the setting #AutoDiscoveryLocationsUpdateRule=1 on a new line.
4. Prefix the new line with # to ensure the setting is applied to all users.
5. Increment the value of the AdminUpdateDateTime setting by 1 to prompt the settings to update for all users.
6. Save the file.

Note: A fix for this issue is planned for an upcoming version.