your out of office settings cannot be displayed because the server is currently unavailable

Hi expert,
I have exchange server 2010 and it was working fine for months but suddenly when users try to set Out of office message in Outlook, they get error "your out of office settings cannot be displayed because the server is currently unavailable " FYI, I don't have auto discovery enabled in server. Internat URL and external URL are correct. Not sure why we are getting this error. I've researched in internet a lot but there are several answers. Please advise

Rgds
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bominthuAsked:
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ctc1900Connect With a Mentor Commented:
I believe you need to have autodiscover configured correctly for OoO and Free/Busy information.  Have you tried the Test E-mail Autoconfiguration for one of the users to see what URL is it trying to connect to?
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Shreedhar EtteCommented:
- Certificate installed on the Exchange Server is a single name cert or Subject Alternate Name certificate.

- Post the output of Get-AutodiscoverVirtualDirectory | fl
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madhatter5501Commented:
you will have to enable autodiscover, I can't tell you why it worked before and not now.  the only thing I can think of is you have upgraded the outlook clients from 2003.
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bominthuAuthor Commented:
When I run test email autofiguration in outlooki get error :"Auto configuration was unable to determine your settings!"
Certificate is single certificate
Free Busy is working fine, I can make appointment, schedules, share in calendar

Rgds,
Maung
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Alan HardistyCo-OwnerCommented:
To get Exchange 2010 working properly you need to buy and install a SAN / UCC SSL certificate with the following minimum names:

mail.externaldomain.com (or whatever you have chosen to use)
autodiscover.externaldomain.com
internalservername.internaldomain.local
internalservername

To get Out Of Office and the Offline Address book working, you will need to create a new DNS A record in your Domains Control Panel (not internal DNS), called Autodiscover and it needs to point to the IP address of your Exchange server.

Once all this is in place, Exchange will work properly and so will Out Of Office etc.

GoDaddy are about the cheapest place to buy an SSL certificate.

Alan
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