Cause:

Update Estimate/Quote message answered "Yes" when editing customer file where ship to information is blank.

Solution:

Restore from backup prior to changes made on customer file or manually edit Bids and Quotes.

Details:

Update Quote or Bid Pro Customer information if Customer is Edited

Utilities>System Options>Order Entry>General>

Category-Configuration

Type- Must be Global 

When Customer information is changed, any Quotes or BidPro estimates using this customer can be updated with the new information.

Chose From:

If one of the first three options is chosen confirmation to apply the changes is still required.