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client connection to exchange with RPC over HTTP

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by jdb3

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I have about 40 Users connecting to my exchange server (2003) remotely using RPC over HTTP. I now have 5 clients that are unable to connect. I have not a lot of knowledge on this and have run out of things to try.
1-Reinstalled outlook 03
2-reinstalled certificate
3-made sure the certificate was in the right store
4-Was able to configure the account on another laptop so it is the 5 laptops

any suggestion would be greatly appreciated.

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by lccano

Check the authentication settings on the server vs the clients that can't connect. Specifically check local security policy at Local Computer Policy -> Computer
Configuration -> Windows Setting -> Security Settings -> Local
Policies ->Security Options -> Network Security: LAN Manager. Compare that to the server settings. You may have the client trying to use LM/NTLM and the server only accepting NLTMv2.

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