Exchange 2007

when i open my outlook one popup message "security certificate--yes, no", I did never seen before when outlook open.
I am admin here and we had nothing change on the exchange server.
pls help whta can i do ?
orkinosAsked:
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jfletchsterIT ManagerCommented:
It is usually a sign the security cert has expired or been updated. Please provide a screen shot of the certificate error to help identify and could you check the expiry date of the cert using the view certificate option
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orkinosAuthor Commented:
yes i think you are right , certificate from 07.09.2011 till 07.09.2011 .How can i change or inactive it?
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ontechCommented:
More Input on the scenario would be appreciated.
Ver of Outlook ?
All user Impact or one user impact.

Also check with the link below if it helps you.
http://support.microsoft.com/kb/940726

Regards,

Jahangir.
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orkinosAuthor Commented:
All user Impact
outlook 2007
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jfletchsterIT ManagerCommented:
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orkinosAuthor Commented:
Hi Jahangir. I know this link but solution very confusition for me
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jfletchsterIT ManagerCommented:
Which step are you stuck on?
You need to run the commands in exchange management powershell.
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orkinosAuthor Commented:
But we have already certificate , can i demage smthg?
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jfletchsterIT ManagerCommented:
The crtificate has expired so you have to replace it with a new one. If your using self signed cert then use this guide, if you have purchase a real cert then you need to get it re-purchased
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orkinosAuthor Commented:
thanks, i used GET-EXCHANGECERTIFICATE | LIST command and I see firma.local, firma.com domains do i need the change all certificate?
Our outlook use firma.local domain.
 
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orkinosAuthor Commented:
i would like to only firma.local certifate change. i use NEW-EXCHANGECertificate command ,how can i change here only firma.local certificate? or do i need to choose option yes-to-all or no-to-all then thumprint?
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jfletchsterIT ManagerCommented:
A new cert doesnt replace, it adds another, so when you have added it you can remove the old .local after
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