The Executor can file a request to the court, to get authorization to sell the property, but that may not speed things up.

In Michigan we have supervised and unsupervised estates (the unsupervised estates are also called simple estates and are of lesser value in the estate) when the courts issue letters of authority to the personal representative / Executor of the estate it will state whether or not the sale of real estate needs approval of the court.

Then get the parcel either rezoned to put it into a residential status where a single family residential property is allowed or leave the zoning alone and get the property designated "legal non-conforming" with a 100% rebuild letter from the taxing authority like the county or city. 

According to the author, you look for a number less than 12.4.

I've had a judge reschedule and added in 10 more days, because she wanted the person to fill out the Authorization to Represent to be the person to be in court attendance (rather then the new property manager handling the file on behalf of the management company).The safest way, would be to evict on a 10 days notice posted for unpaid rent after your possession, and post their door on the closing day - and represent yourself as the new owner.

Having made connections with the base housing authorities at several installations nationwide and accompanied with a strategy that was new to me at the time of reading BiggerPockets very own "INVESTING IN REAL ESTATE WITH NO MONEY DOWN".

These professionals are also authorized to negotiate and carry out the sale of real property on your behalf.The purpose of a Realtor is to help you find your perfect home with as few hiccups as possible.

File a housing complaint or sue them.An authorized resident is not a technicality, it's a lease violation subject to eviction.I'd get out of that toxic situation at all costs. 

This book is your launching point.I am the author and have been a high school business teacher for 20 years.

Even if you are an authorized certifier, you are not able to check your own units nor can it be anyone that is related to you.