Sometimes, network communication problems occur, and the network communication with a participant fails.
Procedure
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Select , to initiate a communication verification process.
A dialog lists each participant with whom communication still failed.
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Do one of the following:
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If you believe that the communication problems are temporary, select No.
Wait to see if communications can be restored and perform the verification process later.
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If you believe that the communication problems are more severe, for instance if the participants have disconnected their network, select Yes.
This removes the participants from the network until they are able to rejoin again.
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If the verification process does not solve the problem, the communication problems are probably of a more serious nature and may require re-configuration of the network settings.