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IT _Admin0723Flag for United States of America

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Email Not Connecting From Mac only

Hello Exchange experts,
Need your assistance on an issue. This is Exchange 2010, Outlook client is 2010

User's account is unable to connect to exchange server from any MAC for mail
User can access his email on any Windows machine
Verified other exchange account on the same Mac with this user logged in - worked
He hasn't changed his password recently.
We removed outlook profile and recreated - failed
Tested owa from his mac - worked
Tried the user test on a Mac that is freshly built - same issue.

Checked and this user’s mailbox has imapi, ews enabled.
Any ideas?
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masnrock
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Are you able to check for any connectivity errors?
I had a client once with Exchange 2010 and the Macs needed the environment root cert installed

Is the root cert installed on the Mac clients?
Check step by step by this instruction.
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@masnrock - we see the traffic from his mac to our cas server and ir showing - tcp conn_terminate error

Then in the event log - solution is suggesting settling a throttling policy and increasing the ewsmaxconcurrency number. It is for one user, and in any mac he logs into. It follows him...

I suggested dragging the user’s plist files and relaunch? Would that help?

Clean keystore?
@nappy_d have to check, but i dont think that is the issue though, bec he experiences it on any mac machine and root certs are local to the machine.
@pavel - that was done initially -  no dice
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masnrock
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Issue solved.. the user has a linked mailbox, modified to a regular mailbox and moved to a different databae and voila, it worked.

Question though - we have other MAC users with linked mailboxes with no issues.
try going to the mail via webmail and see if that works 1st.

also is it your personal email or company?

if its company, sometimes you may need to be connected within the network for it to authenticate, I've had it previously

Thanks
@jenaraj jen - all connected to our corporate network and owa/webmail works...
what error do you get when connecting via outlook?

are you adding the account via going to preference and add account?

Also can you attach a screenshot please?

Thanks

:)
That is correct in the preference. The error is just saying it cant connect to the Exchange server...
can you take a screenshot of the settings ?