Today I was setting up the Dual-Write sync for one of my customers and I bumped into this error message:

Warning:[DWCE0001] Export was skipped. Max lookup count supported in Initial Sync stage is 10. Current lookup count 11

The issue here is that there is a limit in DataVerse that (I would guess) for performance issues there is a hard limit on a maximum of lookup fields.

In our case we had these fields in the default mapping for Customer V3 -> Account using lookup:

transactioncurrencyid.isocurrencycode
msdyn_customergroupid.msdyn_groupid
msdyn_billingaccount.accountnumber
msdyn_paymentday.msdyn_name
msdyn_customerpaymentmethod.msdyn_name
msdyn_paymentschedule.msdyn_name
msdyn_paymentterm.msdyn_name
msdyn_vendor.msdyn_vendoraccountnumber
primarycontactid.msdyn_contactpersonid
msdyn_salestaxgroup.msdyn_name
msdyn_company.cdm_companycode

The workaround is to remove one of the problematic mappings, do the initial sync and add it back. Remember to take a screenshot of the mapping that you are removing so you can put it back exactly the same.