The Microsoft Exchange Transport service is rejecting message submissions because the available disk space has dropped below the configured threshold
“The Microsoft Exchange Transport service is rejecting message submissions because the available disk space has dropped below the configured threshold”
Solution:
This error message is frequently faced by exchange administrators and the only solution for this is to delete the log files which are queued up and utilizing the disk space.
1. Locate the Log file folder and create the backup of log files.
2. Delete the log files from original location. Once the logs are deleted and server gets space, this error will stop occurring.
Exchange Server Data Recovery Software: Recover EDB mailboxes and save to EDB and PST files.