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Exchange2013 hybrid room mailbox o365 user cannot open calendar

Posted on 2016-10-02
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Last Modified: 2016-10-24
Hi,

we had Exchange 2013 CU 14 hybrid deployment any user on o365 cannot open on premises room mailbox calendar. I try read that you need change to default user reviewer permission thats not help. Users can send calendar meeting to room but cannot see free times.

Couples websites tell to check these. Those are right
Set-AutodiscoverVirtualDirectory “SERVER\Autodiscover (Default Web Site)” -WSSecurityAuthentication $True
Set-WebServicesVirtualDirectory -identity “EWS (default web site)” -WSSecurityAuthentication $true

any suggestion to where to start find problem?
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Question by:SamiKarhula
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LVL 16

Assisted Solution

by:Todd Nelson
Todd Nelson earned 900 total points (awarded by participants)
ID: 41825434
Can the O365 users see any calendar information for any on premises users?

If not, it is typically an issue with WSSecurityAuthentication.  I've experienced it a few times where the O365 users cannot see any free/busy info for the on premises Exchange 2013 users and had to call O365 support the first time.  The resolution was to set the value for WSSecurityAuthentication to false and then set it to true.  This fix helped in all the other instances where this specific issue appeared as well.

These are the commands I run, in order...

Get-WebServicesVirtualDirectory | Set-WebServicesVirtualDirectory -WSSecurityAuthentication $false
Get-WebServicesVirtualDirectory | Set-WebServicesVirtualDirectory -WSSecurityAuthentication $true

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Only ever needed to set it for EWS and never had to run for autodiscover.
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Author Comment

by:SamiKarhula
ID: 41825447
Any user in O365 cannot see on premises calendar. I try those command and restart server again. Same problem still
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LVL 43

Assisted Solution

by:Vasil Michev (MVP)
Vasil Michev (MVP) earned 600 total points (awarded by participants)
ID: 41825450
Just to add to the above, there might be some other possible causes, they're all detailed in the Hybrid free/busy troubleshooter: http://support.microsoft.com/common/survey.aspx?scid=sw%3ben%3b3526&showpage=1
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LVL 16

Expert Comment

by:Todd Nelson
ID: 41825457
After making the setting change, I've seen it take 15-60 minutes (at times) for the O365 users to see the on premises users.
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Author Comment

by:SamiKarhula
ID: 41825458
Thanks Todd and Vasil. i wait and check again and check Vasil survey topic.
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Author Comment

by:SamiKarhula
ID: 41825471
I check that Vasil link and i pass everything until that WSSecurity

On the Exchange 2010/2013 CAS server, click Start, click Run, type %SystemDrive%\inetpub\logs\LogFiles, and then press ENTER.
Open the W3SVC1 folder, and then open the latest IIS log file.
In the latest IIS log file, search for "exchange.asmx/wssecurity”. The following screen shot shows an example of the request in the IIS log:
P15_error5016

We had only 1 CAS server and everything else works fine. I´m pretty sure thats not a firewall problem... and there is no anything pre-auth.
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Author Comment

by:SamiKarhula
ID: 41828491
After WSsecurity change. Outlook users can open calendar. But still O365 OWA users cannot open calendar...
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LVL 16

Accepted Solution

by:
Todd Nelson earned 900 total points (awarded by participants)
ID: 41828500
At this point, I usually end up contacting O365 support to have them figure it out for me.  They might figure it out in a couple of minutes where it may take additional hours days for you.
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Author Comment

by:SamiKarhula
ID: 41829263
I think same. I contact O365 support :)
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LVL 16

Expert Comment

by:Todd Nelson
ID: 41856703
Sufficient guidance provided toward a resolution.
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