Решение из гугля, пусть поживет тут, чтобы не потерялось-

1. Navigate to Central Administration.

2. Go to Application Management > Manage Web Application and click on your web application to select it.

3. In the Ribbon, click on General Settings drop-down and choose “Resource Throttling”.

4. In the “List View Threshold”, increase the value (by a factor of 2, for example) and click OK.

5. Try to replicate the error.  If the error persists, increase the value again until the error goes away.