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Skype for Business stuck at sign-in

Hello all.

I had this problem recently. Skype for Business 16 is stuck at "Contacting server and signing in..." and doesn't give any error.

I tried the solutions stated here:

https://answers.microsoft.com/en-us/msoffice/forum/msoffice_sfb-mso_win10/what-causes-skype-for-business-not-to-sing-in-and/fc05d5ac-e5cc-4289-ae7f-50b94fd39a92

It didn't work, I also tried other solutions on the internet.

I don't have any problems with the account, because I can sign in from another computer.

It has been several days now, and I couldn't sign-in once from my own computer.

Attention: I might be in the wrong track regarding to following explanations, I just think it may be the cause but not sure.

It may be a certificate error, I checked the connections in netstat when Skype was trying to connect.

There were different connections which were direcly going to IP addresses and putting them on my browser first gave me the certificate is not trusted error and then continuing to address took me to the office365 sign-in page. Example:

netstat show a connection established to there but browser gives certificate error: https://132.245.61.226/

The address it takes me and doesn't give me a certificate error here(removed some parts from link): https://login.microsoftonline.com/login.srf?wa=wsignin1.0&[removed]&wreply=https%3a%2f%2f132.245.61.226%2fowa%2f&[removed]

I would be really glad if someone could help. I am logging in from an RDP environment right now but need to solve it on my PC.

Answer
Answer

I spent hours trying to look up all ways trying to resolve this. Contacted Office 365 tech support, which he had no idea, so we brainstormed some ideas and I finally found a way to do it!

1) Restart your machine to make sure all processes are closed regarding anything microsoft related.

2) Type in Certmgr.msc in the run window.

3) Click on the Personal folder and then the Certificates folder.

4) delete all the same records that are issued by Communications Server

5) if you can not delete them, try restarting again and make sure you disable anything from booting that is O365 related.

6) fire up Skype for Business 2016 and BAM! It worked!

This fix was done on Windows 10 Pro 64 bit.

Thanks yall!

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Last updated January 30, 2024 Views 68,132 Applies to: