Resolution 1:
Re-enumerate both Source and Target Exchange Organizations to update the SQL database.
Resolution 2:
If re-enumeration does not correct the error, then create a new SQL database.
This will clear all configuration and existing sync jobs.
1. Click on Open Project
2. Select Configure SQL/MSDE tab on the left.
3. Click on Create a new database:
4. Enter a name for the new database.
5. Click Next, then click Finish.
6. Add Source Exchange Organization.
7. Add Target Exchange Organization.
Resolution 3:
1. Closely check the EMWMigration.log file. It may have a trace similar to the following right before the warning:
Execute SQL: GET_EXCH_ORG_SERVERS @EXORGGUID = '[GUID]
2. Run the stored procedure mentioned in the log file in SQL database with the value from the log (Stored procedures are found under Programmatically node in MMEX SQL database). If it shows any errors or return the error, open the corresponding SQL database table (in this case it is EXCH_SERVER) and check whether the record in question has got NULL value in any of the fields. In this certain case it was found out that the DN field of one of the records of EXCH_SERVER table was set to NULL.
3. Mark this record as DELETED (in case the records looks wrong and is not required in the table) or populate the missing field with the valid value.
