Forum Post: RE: CRM Solution Import Error: Index size exceeded the size limit of 900 bytes. The key is too large. Try removing some columns or making the strings in string columns shorter.

Is your field a find column in the quick find view? If yes, that's the reason. Because for find columns automatically an index is being created and there are limitations reg. the max. number of characters. This is a limitation on sql side. docs.microsoft.com/.../maximum-capacity-specifications-for-sql-server And since you mentioned you changed it from 4000 to 3, I assume this is a multiple lines of text field. That field will always consume 4000 characters in the db, although you set it to 3 characters (which only does validation that no more than 3 characters can be entered). Hth Thomas