Quest Migration Manager for Exchange ships with SQL Server Express 2005 which has a built in size limit of 4GB. When certain conditions of a project are met this limit can be reached:
CREATE DATABASE or ALTER DATABASE failed because the resulting cumulative database size would exceed your licensed limit of 4096 MB per database.
This size limit is set by Microsoft and cannot be changed.
There are a couple of options to resolve this issue.
1. Shrink the database using SQL Server Management Studio.
2. Move the database to SQL Server Standard Edition or higher.
3. Upgrade the existing SQL Server Express 2005 Edition to SQL Server Express 2008 R2 or higher. Starting with 2008 R2 the database size limit was increased to 10GB
To shrink a database.
1. In Object Explorer, connect to your SQL Instance that holds the Migration Project Database.
2. Expand that instance and expand the Databases, then right-click on the database that you want to shrink.
3. Point to Tasks, point to Shrink, and then click Database.
4. Click Ok
To move a SQL Database to another SQL Server you can follow the directions using the link below.
http://support.microsoft.com/kb/314546
To upgrade to SQL Server 2008 R2 or higher.
You can use the link below for assistance upgrading to a higher version of SQL Server Express.
http://msdn.microsoft.com/en-us/library/bb677622(v=sql.100).aspx
