Exchange 2010 and 2013 coexistence issues.

Phy2015
Phy2015 used Ask the Experts™
on
Hi,

I have a coexistence of exchange 2010 and 2013.  After installing a certificate on the 2013 server i have lost email connectivity with cell phones and I am not sure how to correct this issue.

I am also considering backing out of the coexistence by uninstalling 2013, making sure that 2010 is healthy and trying the upgrade again.

Any assistance is appreciated.

thank you,
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EE Solution Guide - Technical Dept Head
Most Valuable Expert 2017
Commented:
Please do a test  of Microsoft Exchange ActiveSync Connectivity
https://testconnectivity.microsoft.com/

Did you install the same certificate in Exchange2010?
If not please install in 2010 as well.

Author

Commented:
See attached errors.

Could this be associated with the certificate i installed on the 2013 server?
Connectivity-test-for-autodiscover.jpg

Author

Commented:
MAS
Are you saying that i should have the same certificate installed on both servers?
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MASEE Solution Guide - Technical Dept Head
Most Valuable Expert 2017

Commented:
-->Are you saying that i should have the same certificate installed on both servers?
Yes

Author

Commented:
I'll give that a try.
Thank you!

Author

Commented:
you cannot install the same certificate on both servers.


error
 
A special Rpc error occurs on server PHYEXCH13: Cannot import certificate. A certificate with the thumbprint CDC91...............................................C871 already exists.
MASEE Solution Guide - Technical Dept Head
Most Valuable Expert 2017

Commented:
-->A special Rpc error occurs on server PHYEXCH13: Cannot import certificate. A certificate with the thumbprint CDC91...............................................C871 already exists.
Are you sure you exported the new certificate?
if its a renewed certificate it will have a unique thumbprint

Author

Commented:
Yes, i did the export from 2010 and the import to 2013.
MASEE Solution Guide - Technical Dept Head
Most Valuable Expert 2017

Commented:
You still have issue for mobiles?

Author

Commented:
Hi MAS,

What I did was undo some of the DNS changes i had made to activesync and autodiscover and the phones began connecting again.

I will begin moving forward with the upgrade again in the near future when i can dedicate more time to that project.

Thank you for your assistance.
MASEE Solution Guide - Technical Dept Head
Most Valuable Expert 2017

Commented:
Glad to know you sorted out.

Author

Commented:
MAS

Your initial response time was quick and your patients  with me is greatly appreciated.

I'm sure i will be asking Exchange questions in the future and I hope you are still assisting with these issues.

thank you
MASEE Solution Guide - Technical Dept Head
Most Valuable Expert 2017

Commented:
Pleasure  :))

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