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Exchange Best Practices - Active Directory certificate expired

AD box - 2003 server standard
exchange 2003 server - 2003 server standard
I have been having weird issue with AD and Exchange.
I ran the best practices analyzer tool and got a few errors  and warnings.
Active Directory Server
Certificate has expired
The SSL certificate for 'https://domain expired 'date'. Users may be unable to connect with the server.

Server: Mail
Older 'EXCHMEM.DLL' present
I'll follow instructions to fix.

1) Active Directory server cannot be contacted
2) Certificate principal mismatch

Are these anything to worry about? I assume the certificates are related to RPC over HTTP and activesync
This server has never had this configured before, so that why I assume the old cert

however, I do sometimes see errors with Exchange server trying to contact AD server.

Any ideas appreciated.

1 Solution
The best practises tool try to connect to https://domain.com - I have no idea why.
In many cases domain.com points to a web site outside of your network. Therefore you either get an SSL warning or no SSL certificate exists error. I ignore them all.

dguillenAuthor Commented:
just removed exchange and reinstalled it.

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