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Exchange ECP log-in loops back to log-in after entering credentials.

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Last Modified: 2018-11-01
Greetings.
I recently updated our SSl certificate on Exchange 2016.
Upon ding so, I lost connectivity to my ECP portal.
All I get when I login in is a reloop back to login again.
I have tried checking the certificate and settings but they look good as per my understanding.
I am not an Exchange Guru and this is the first time I encountered this issue.
I do need this resolved so I can add new users to our environment.
I could do it from our other Exchange Server in the DAg, but I do not want to go that route.
Reason being is that the issue will still be there: relooping after attempting to login.
I do can use OWA but not ECP.
I am running windows 2012 R2 as the OS for Exchange 2016.

I checked the settings in "default website" the bindings and they are correct pointing to the correct certificate.
I restarted the service on IIS in application pools called "MSExchangeECPAppPool", but to no avail.

Thank you for your attention.
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Server engineer
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Commented:
This problem has been solved!
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j_ramesesInfo Sys Mngr

Author

Commented:
Saif, thank you for your response.
So I should confirm that the settings from binding from my "exchange backend website" settings should match the "Default website"?
Saif ShaikhServer engineer
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Commented:
yes even if you have a valid self-signed cert binded to exchange backend then its fine, but you can keep the same third party doesn't matter.
j_ramesesInfo Sys Mngr

Author

Commented:
Therefore both should match identically?
defaultwebsiteBindings1.JPG
ExchangeWebsiteBindings1.JPG
Saif ShaikhServer engineer
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Commented:
NONNONONO

Click on edit 443 on default website and you should see a view tab and there you will be able to see the cert.

Also click on edit 444 on backend website and you should see a view tab and there you will be able to see the cert.
j_ramesesInfo Sys Mngr

Author

Commented:
when I attempt to change the port from 444 to 443 on "https" on "exchange backend" I get the below error message.
error-message-uon-changing-port-numb.JPG
j_ramesesInfo Sys Mngr

Author

Commented:
I see the certificate since I changed it.
bindings-of-exchange-backend.JPG
Saif ShaikhServer engineer
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Commented:
Do not attempt to change any ports, just see if port 443 on default website and port 444 on exchange backend has the correct cert.
j_ramesesInfo Sys Mngr

Author

Commented:
Saif, thank you.
I added the correct cert on the ports for exchange backend server.
Afterwards I restarted the IIS services/server.
Once that completed, I know have access to my ecp.

I will have to put this in my notes for when I have to update the cert again in years time from now.

Thank you for your assistance.
Saif ShaikhServer engineer
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Commented:
Good to see the issue is resolved. You are welcome.