Conditional mail merges allow users to include multiple letters in one mail template. When a conditional mail merge is set up, it is based on a conditional field. This solution discusses the fact that the between, contains, or one of operators are not available to choose from when setting up the conditional merge.
Please contact the appropriate software vendor or IT professional for assistance with this process or issue, which is beyond Blackbaud's scope of support. We are unable to address this issue because it is related to third-party software. Contact Microsoft for assistance.