Vast majority of my users are reporting  a pop up window with a login name. This window is for the cashub server after doing some more digging the auto discover is not running properly on this server.

The users receive and send e-mails just fine however they are unable get rid of the pop up box for auto discover.
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lastlostlastConnect With a Mentor Commented:
Verify IIS permissions as per

If it still is prompts for credentials, recreate the Autodiscover vDir.

-> Remove-AutoDiscoverVirtualDirectory -Identity "CAS_Name\Autodiscover (Default Web Site)"

Let us know how it goes.

You can add a DNS record for autodiscover to point to your exchange IP with the name autodiscover. The domain name should be or autodiscover.mydomain.local

Here is a good doc for autodiscover
from personal experiance sometimes this issue also related to Certificates (self or CA generated) you can check certificate validity of cashub
good luck
MortgageInvestorsAuthor Commented:
Resolved it my self.
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