Attachment Size - Office 365 - Microsoft Community


i've synchronised on prem ad office 365 azure ad.  when open owa account , send attachment larger 10mb, receive "your limit 10mb" error.  looking @ the internaldsnmaxmessageattachsize , externaldsnmaxmessageattachsize, set 10mb , not 25mb default.  powershell not allow these 2 attributes altered no longer supported.  any ideas on how can change this.  thanks.

hi erick,

looks i've sorted it.  in server hub transport, receive connectors, inbound office 365 set 10mb.  increased 35mb , works :-)  appreciate on this.

steve

ps ideas moderating e-mails between on-prem , office 365!!



Office / Outlook / Other/unknown / Office 365 for business



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