Client Authentication-Certificate


why do i see new certificate every day in my personal certificates with just one day expiry. I am a office 365 user.
See attached image of my cert.

Thank you in Advance
Moin AhmedSenior System AdministratorAsked:
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Vasil Michev (MVP)Commented:
This is a certificate used by Skype for business, it's used for authentication purposes.
Moin AhmedSenior System AdministratorAuthor Commented:
Thank you for the response. If we need to change the validity period for these certificates, how do we do that? please note we are on Office 365 and using Skype for business Online. No on-premise exchange or skype/lync server.
Vasil Michev (MVP)Commented:
You can't, we as customers simply dont have access to such settings. Why do you want to change it anyway?
Moin AhmedSenior System AdministratorAuthor Commented:
Can you share any KB with me that says you cannot change the number of days for expiry?
Vasil Michev (MVP)Commented:
KBs in general are intended to address a problem, not detail how products features work. I still dont understand what exactly you are trying to achieve, but if you want an "official" answer you can always open a support case with Microsoft.

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