Problem:

A user receives an error when sycning CRM on an iPad:

Exceeded 100000 distinct ids.

Root Cause:

The query returns too many results, hitting a Salesforce query limit.

Some queries, when run by a user without View All Data permission, require checking Sharing Rules if many records are returned.

This includes queries on objects that use a polymorphic foreign key, such as Task or Attachment.
Such queries return this exception because the operation requires too many resources.

Solution:

Update the Where clause on the VMobile Object Configuration (VMOC) for the object to narrow the scope of the data downloaded.

Related Documentation:

Salesforce Help Documentation: