Forum Discussion

Copper Contributor

Sep 15, 2016

Email Proxy (Alias) Addresses Suddenly Capped at 200?

Suddenly, aliases have been capped at 200 without any stated reason. I have been using more than 200 aliases for 15 years because I assign a specific address to vendors to find out who sells my em...

Copper Contributor

Sep 15, 2016

Office 365. Is this not the correct forum?

MVP

Sep 15, 2016

There's a lengthy thread about this on Answers: New limit on "proxy" addresses - unable to delete old proxy addresses or add new ones

I've pinged some MS guys on this, guess I should give them another poke.

Jim Wilson
Copper Contributor
Sep 15, 2016
I, too, commented on that thread with added emphasis. I'm just trying to get to the bottom of the actual reason this has suddenly been limited. It has created yet another issue I didn't need today.
- Victor_Ungureanu
  Microsoft
  Sep 16, 2016
  Hello,
  
  The number of proxy addresses was limited because of an AD limit that can be reached otherwise.
  
  http://social.technet.microsoft.com/wiki/contents/articles/31919.active-directory-non-linked-multi-valued-attribute-size-limits.aspx#Limits_for_Non-Linked_Multi-Valued_Attributes
  
  Best regards!
  - Jim Wilson
    Copper Contributor
    Sep 16, 2016
    I do not believe that article applies because (1) it describes the 2000 and 2003 versions of AD and (2) this change only occurred this month.
    
    I know this because we migrated to O365 in December 2013 with accounts containing more than 300 aliases and without any such complaint. One account went over 400 earlier this year.
    
    I log into the Exchange Admin Center almost daily and this "error" dialog only began appearing this week. There is no other conclusion I can draw except that an arbitrary, possibly accidental and certainly unwelcome policy change has occurred.
    
    I am simply attempting to question this change as I do not believe the full impact was considered. I would like to petition for reconsideration.

Resources