When attempting to transfer a call in Microsoft Teams, we encounter the following error 503 Service Unavailable.
Did this user transfer the one-on-one calls in Teams like this article's description?
Does anyone else have the same problem in your organization?
Based on my knowledge, a 503 Service Unavailable Error indicates that a web server is temporarily unable to handle a request. The error can occur for a number of reasons, but the two most common reasons are that the server is overwhelmed with requests or is having maintenance performed on it.
If your organization's user meet this problem, it firstly recommends try to see if Teams web client can transfer call normally. If there is no issue in Teams web client, please try to follow these steps to clear Teams client cache file to see if it works:
- Fully quit Microsoft Teams and ensure it’s not still running in the toolbar at the bottom right of Windows.
- Navigate to %appdata%/Microsoft/Teams in a File Window.
- Select everything in the folder.
- Delete everything.
- Open Teams and wait for it to download required files.
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Hi @IBN ，
I read through your post and noticed that the issue happens randomly, which usually means it could be quite hard and time-consuming to troubleshoot.
With that being said, agree with the what Jimmy has suggested that it's worth trying to testing on Teams web client for several days and see if the issue can be reproduced, This at least can help narrow down whether the issue needs to be investigated futher from the desktop client side.
It has been a while, how is everything going?
If you have any update about this issue, please feel free to post back.