User Profile
Arindam_Thokder
MicrosoftJoined 8 years ago
User Widgets
Recent Discussions
Re: Weird behavior of Exchange Online for none-existing email address
Jack_Chen1780- I think you got confused by the line "The Fortimail IP address must be shared between many tenants and not a dedicated for you". Let me try to explain - Some IP Addresses of servers/devices are shared and used to send to multiple tenant (and by this line, I am not trying to say that the IP belongs to a particular tenant). Some tenant can create an inbound connector (of type on-premises or partner) to accept email from that IP, sometime multiple tenants can create Inbound connector from same IP Address as the sending IP is shared and that can cause issue with attribution. It's not as simple as just RCPT TO. I suggest you read the techcommunity blog to know about that- https://techcommunity.microsoft.com/t5/exchange-team-blog/office-365-message-attribution/ba-p/749143 You mentioned "when it is connected to EOP, before the "RCPT TO", there isn't any data indicating which EOP tenant it wants to send email." - This is not correct. The connecting f IP Address can be mapped to a tenant based on Inbound connector created. You have an Azure VM with public IP 20.48.254.109, and most probably no one has any Inbound connector created to accept email from that IP Address, that's why there is no confusion. But if the IP address is widely used, then it's not that simple. Thats why we need to wait till EOD and see all the headers to make sure we are rejecting an Invalid address properly.8KViews0likes5CommentsRe: Weird behavior of Exchange Online for none-existing email address
Jack_Chen1780 - Hello Jack, by sending IP, I meant the IP that connects to EOP. The Fortimail IP address must be shared between many tenants and not a dedicated for you. If it's a dedicated IP Address, then you might have an On-premises type connector from that IP Address in your tenant. You can try by deleting the connector or changing the connector type to Partner to see if the behavior changes. But this won't change anything if the Fortimail IP Address is shard.8.1KViews0likes7CommentsRe: Weird behavior of Exchange Online for none-existing email address
Jack_Chen1780 - This behavior is expected. The DBEB functionality can reject on either RCPT TO or on "End Of Data". The latter happens when the sending IP is shared between multiple tenants, and in order for EOP to correctly attribute to the recipient tenant, we need to traverse the headers which are available only after EoD.8.5KViews2likes9CommentsRe: Activating transfer for antispam policy creates HTTP 500 errors
VasilMichev - This seems to be a problem with Enable-OrganizationCustomization cmdlet we see often - If not enabled, the tenant is not hydrated and cannot edit settings. Can you create a support case so Support can bug it to PG?1.5KViews0likes1CommentRe: Accessing the quarantine of a shared mailbox
Piotr_Jezewski lazarus72 - As mentioned earlier, the plan is to give end user access the quarantine for shared mailbox by changing the recipient address to shared mailbox from quarantine portal. This change is yet to be enabled for worldwide tenants. Unfortunately, I do not have an ETA for this.28KViews1like3CommentsRe: Accessing the quarantine of a shared mailbox
JG-Burke - one can open quarantine of shared mailbox from clicking on the link on the End user spam notification which would be delivered to the shared mailbox. There is also another easy way where a mailbox with full permission can open their own Quarantine and then from the filter, change the recipient address and and mention the shared mailbox there. However this has some issue now which are looking at this moment. It should start working very soon.29KViews1like6CommentsRe: Defender for Office 365 and quarantined objects in shared mailboxes with security groups
VasilMichev - We are already working on a feature to access quarantine for shared mailbox where permission is granted through security groups. I hope I can share something around early second half of the year 20218.7KViews5likes2Comments
Recent Blog Articles
No content to show