RPC over HTTPS authentication

I have RPC over HTTPS published through ISA 2004.  It has been there up and running for three years now.  Users are added on occaisional basis and there is no problem at all.
A couple of days ago, I started witnesseing something weird.  And no other user has reported a similar problem to me.
When I start Outlook in RPC over HTTPS mode, I am asked to provide my password.  It has always been the case and that is ok.  However, now, that password box would repear every, say, five minutes and ask for my password.  Sometimes, the dialogue box is titled "Connect to <server name>" and other times it is titled "Connect to <FQDN of exchange server>"  The weird thing is that no matter how many times I key in the password, it keeps popping up again and again.
I am not aware of anything that I have done in Exchange server that might have caused this annoying issue to arise.
Any input is highly appreciated.

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Hi Please do a Test at testexchangeconnectivity.com  and post the results here. Else here is something I got from MS Guys:
If “Remember my password” doesn’t work and you keep getting prompted: a) close outlook b) go to Start... Run and type 'control userpasswords2' (without the quotes) and press OK c) click on the Advanced tab and press 'Manage Passwords'
d) find the entry for your mail server and click ‘Properties’
e) erase the Server name and type in ‘S1’ or whatever the simple name of your global catalog server is (without the quotes)
f) leave the password blank and click OK
g) start Outlook, enter your password and check off ‘Remember my password’ one last time. It should not prompt again.



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Yba02Author Commented:
The password manager solved the issue.
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