Hello, friend!
Request client contact personnel to check whether:
1. The server where eService resides is powered off.
2. The network connecting to the server where eService resides is normal.
3. The eService background service is enabled.
4. The disk space for running eService is greater than 5 GB.
5. The ports 7445, 8445, and 9445 are connected properly (if the Internet channel is used).
6. The mailbox used by eService is correctly configured (if the email channel is used). After the previous problems are eliminated, restart eService. Then, if the client connection is not restored after two hours (when the Internet channel is used) or not restored after six hours (when the email channel is used), troubleshoot the problem again.
Help this helps!