Hi,
The official policy is once your certification expires you need to retake the exam, however, it wouldn't hurt to ask them to make an exception. To do this you need to contact a Microsoft Credentials forum support moderator. They will typically respond within 2 business days. Please use link below to ask new question over there:
https://trainingsupport.microsoft.com/en-us/newthread?threadtype=Questions&forum=mcp
Please click Accept Answer and upvote if the above was helpful.
Thanks.
-TP