Exchange 2013 – On Premise – Public folders

Hi All,

First post, so please let me know if this is in the right area:

I have recently come across an issue with Public Folders from an Exchange 2013 on-prem server. When a user launches Outlook 2016, from either inside the network or outside, they are prompted 5/6 times to enter there credentials and finally the prompted disappears for a period of time then it will come back.

Its very strange as this has only started happening within the last 2/3 weeks and seems to consists with the latest Windows/Office updates, but I cant be certain that is the case.

Has anyone else has a similar issue, and been able to resolve?

Thanks Matt.