Hi,
Sorry for the late reply!
>>> The network folder speciified is currently mapped using a different user name and password. To connect using a different user name and password, first disconnect any existing mappings to this network drive."
1.When you Attempting to 'Map Network Drive' on B, do you use the same account as before? If the share is mapped under a different user, you get that message. For more details, please refer to:
https://learn.microsoft.com/en-us/troubleshoot/windows-server/networking/cannot-connect-to-network-share
>>> "Access to the path '\A\c_drive' is denied."
1.Please make sure that the account you use have FullControl access for the file security property.
Hope you have a nice day : )
Gloria
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