Solved

Lync Control Panel 404.4 Error

Posted on 2016-10-11
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Last Modified: 2016-10-18
I have Lync Server 2013 running on Server 2012 R2. All of a sudden the Lync Server Control Panel isn't loading anymore. Attached is an image of the errorLync-Error.PNGI am getting HTTP Error 404.4-Not Found page.
Detailed Error Information
Notification:MapRequestHandler
Handler: not yet determined
Error Code: 0x8007007b.

I have been able to log in just fine in the past but when I tried the other day I am getting the error. I have verified that Lync is 100% up to date as of now. I looked through the event log and haven't found anything that would point to an error. I'm sure it is a setting somewhere in IIS but I cannot find where. Someone please help
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Question by:Chris Nelson
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15 Comments
 
LVL 23

Expert Comment

by:Mohammed Hamada
ID: 41840670
On front end if you open the following url would it work?
https://localhost/cscp

try that and see if u get the same error?
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Author Comment

by:Chris Nelson
ID: 41840674
When I try to load https://localhost/cscp on the local server I do receive the same error page.
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LVL 23

Expert Comment

by:Mohammed Hamada
ID: 41840726
When you open IIS.. can you check if CSCP virtual directory exists or not?
Also open event viewer and check under the Lync logs if there any recent errors .. please post their event numbers here for the last 10 error events
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Author Comment

by:Chris Nelson
ID: 41840749
Attached is the event viewer and IIS showing CSCP. The error in event viewer appears to be a different error and is going back to when the control panel was last working
CSP.PNGEvent-Viewer.PNG
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LVL 23

Assisted Solution

by:Mohammed Hamada
Mohammed Hamada earned 500 total points
ID: 41840773
Have you recently installed any Cumulative update?
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Author Comment

by:Chris Nelson
ID: 41840778
Any updates that I would of installed would have been from Windows update, so I may have
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Assisted Solution

by:Chris Nelson
Chris Nelson earned 0 total points
ID: 41840816
I looked up the error and ran the following powershell command:

Install-CsDatabase -ConfiguredDatabases -SqlServerFqdn frontendserver.fqdn -Verbose

I am no longer getting all the event log errors, however I am still getting the 404.4 error trying to load the Lync Control Panel
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LVL 23

Expert Comment

by:Mohammed Hamada
ID: 41840966
try IIS reset on CMD .. also run Lync Deployment wizard - Setup or Remove components.. see if things gets improved?
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Author Comment

by:Chris Nelson
ID: 41840988
I ran IISReset and The  Lync Deployment wizard - Setup or Remove components and I am still getting the same error
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LVL 23

Expert Comment

by:Mohammed Hamada
ID: 41840997
Have you assigned a certificate ?? Can you please post a screenshot of your IIS binding of the port 443?

Also on CMD run the following commands and post the result here

Netstat -anbo >ports.txt    Enter
notepad ports.txt     Enter

Post the ports result here.
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Author Comment

by:Chris Nelson
ID: 41841013
Yes I have a certificate assigned. Where do I pull the screenshot for the IIS bindings of port 443?

So a little history on what may of broken the control panel, I was trying to get lync to work on mobile internally only. I don't care about it working outside of my company only internally on our wireless. In trying to set it up I was attempting to setup a reverse proxy in IIS. I ended up getting other errors so I removed all the settings I changed and this is when I noticed that the control panel wasn't working. Not sure if control panel had been offline before this or if my changes effected something somewhere.
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Author Comment

by:Chris Nelson
ID: 41841024
Attached is the IIS binding for port 443IIS-Binding.PNG
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Accepted Solution

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Chris Nelson earned 0 total points
ID: 41841066
I finally fixed it! Here's what I ended up doing.

I removed IIS rewrite 2.0 module from add/remove programs

Then I re-ran the lync deployment wizard Setup or Remove components and everything is working again!

Not sure if you'll know how to get lync mobile to work internally or not by chance? I can open another thread and can try and work on that. I'm just afraid whatever I did trying to get it to work in the first place will break lync control panel again
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LVL 23

Expert Comment

by:Mohammed Hamada
ID: 41841399
IIS rewrite 2 is normally not installed on Lync front end as far as I can remember. it's installed on the IIS ARR server which is considered a reverse proxy for lync's mobility feature.
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Author Closing Comment

by:Chris Nelson
ID: 41847983
I was able to google more into the issue and found the solution but with assistance from Mohammed
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