problem in one sentence: outlook credential login window pop up often since I initial created a public folder (on exchange 2013)
It is asking for email@example.com ...
My intention was to test a sync with pbx via publicfolder. (exchange 2013)
Publicfolder was not in use before.
I initial enabled publicfolder and granted access via Exchangepowershell.
Add-PublicFolderClientPermission -Identity \test-publicfolder -AccessRights PublishingEditor -User PAULA
Add-PublicFolderClientPermission -Identity \test-publicfolder\test-contacts -AccessRights PublishingEditor -User PAULA
a) on-premises exchange 2013 (latest CU)
b) outlook 2019/office 365 app 32bit (latest updates)
c) notebook is domain-member and using outlook anywhere
e) notebook is not in the local-netwerk (homeoffice) but has VPN for fileshare (not all the time)
e) public-certificate is in use
f) azure AD sync existing (only password sync is configured)