Description of the error:
When booking coexistence a meeting room in Pronestor Planner, the meeting rooms outlook address is replaced with it's legacy exchange dn, for example
George Michael </o=[Our Domain]/ou=[Whatever User Group] (FYDIBOHF23SPDLT)/cn=Recipients/cn=gmichael>
The error only happens with coexistence meeting rooms.
The problem is that the address book isn't updated. This is a microsoft error, so Pronestor can't fix it.
But there are several guides online on how to fix this in outlook.
For example this link https://community.spiceworks.com/topic/1985480-outlook-2013-showing-legacyexchangedn
We have also used this fix to force outlook to update its address book:
- Close outlook
- Go to %userprofile%\AppData\Local\Microsoft\Outlook\
- Search for all .OAB files
- Delete all .OAB files
- Restart outlook