Limitations in MSCRM 4.0
The below are the limitations in MSCRM You cannot have more than 8 tabs in a form. FetchXml brings at a time not more than 5000 records. Export to excel by default exports only 10000 record(This setting can be altered). For an entity, we can add upto 5 duplicate detection rules. If a duplicate detection rule is enabled on a field then, you can only have the width of that column at the max 450 characters width.