Is it still true that an officer cannot carry an umbrella while in uniform?

18–29. Umbrella
a. Type. The umbrella is an optional purchase item.
b. Description. The umbrella is black, plain, with no logos or designs, and of a commercial design.
c. When worn. Soldiers may carry and use an umbrella, only during inclement weather, when wearing the service (Class A and Class B), dress, mess, and evening mess uniforms. Umbrellas are not authorized in formations or when wearing field or utility uniforms. Commanders may further restrict Soldiers’ use of umbrellas as appropriate. See DA Pam 670–1.

Pulled this from AR 670-1, if there is a different AR that states officers cannot use an umbrella, it is unknown to me sir. (DA PAM 670-1 has almost the exact same excerpt)

670-1 states: Soldiers may carry and use an umbrella, only during inclement weather, when wearing the service (Class A and Class B), dress, and mess uniforms. Umbrellas are not authorized in formations or when wearing field or utility uniforms. Commanders may further restrict Soldiers’ use of umbrellas as appropriate.

Can they? Perhaps. Will they? Not sure about that! That’s an old custom that will stay for a long time.

Not while wearing field or duty uniform (like cook whites, or medical scrubs)

If wearing a dress uniform, they can. I've only seen trench coats used myself

I have not heard that before but I'm sure someone in the know will pipe in CPT Dennis Stevenson

The thought of wielding an umbrella has never crossed my mind the entire time I served. I mean, they do issue wet weather gear. And how often have you seen a soldier wear his/her black trench coat during formal events?.. Rarely, if ever.

First time hearing about this sir

Marine Corps still only authorizes umbrella use by females.