In case com.openexchange.contact.fulltextAutocomplet has been set to true an appropriate FULLTEXT index is going to be created once(!) through an update task after Groupware restart. The FULLTEXT index to create gets aligned to the fields as specified in com.openexchange.contact.fulltextIndexFields property.

Once the update task has been executed, altering the com.openexchange.contact.fulltextIndexFields has no effect, unless associated update task com.openexchange.contact.storage.rdb.groupware.Add FulltextIndexTask is re-executed.