Understanding modern public folder quotas

As a part of our ‘demystifying modern public folders’ series we have so far discussed the modern public folder deployment best practices and available logging for monitoring public folder connections. In this blog post, we are going to discuss public folder quotas. Let’s get to it! Public folder mailboxes and quotas Mailbox quotas are not…


Announcing availability of 250,000 public folder Exchange 2010 hierarchy migrations to Exchange Online

Last September, we announced a beta program to validate onboarding of public folder data from Exchange 2010 on-premises to Exchange Online with large public folder hierarchies (100K – 250K public folders). We are glad to announce that Exchange Online now officially supports public folder hierarchies of up to 250K public folders in the cloud –…


Discontinuation of support for Session Border Controllers in Exchange Online Unified Messaging

In July 2018, we will no longer support the use of Session Border Controllers (SBC) to connect 3rd Party PBX systems to Exchange Online Unified Messaging (UM). We’re making this change to provide a higher quality of service for voicemail, using standard Exchange and Skype for Business protocols. Customers considering a new deployment of this…


TooManyBadItemsPermanentException error when migrating to Exchange Online?

Some of you may have noticed that more migrations might be failing due to encountering ‘too many bad items’. Upon closer review, you may notice that the migration report contains entries referencing corrupted items and being unable to translate principals. I wanted to take a few minutes and provide more information to help understand what…


Office 365 Directory Based Edge Blocking support for on-premises Mail Enabled Public Folders

Update 7/10/17: Added a line about OU consideration to Important Notes section. Until now, our on-premises customers who use  Mail Enabled Public Folders (MEPF) could not use services like Directory Based Edge Blocking (DBEB). If DBEB is enabled, any mails sent to Mail Enabled Public Folders (MEPF) will be dropped at the service network perimeter….


2nd call for public folders to O365 Groups migrations

Update: this beta program is now closed; please see this for the feature availability announcement. We got some replies to our previous post on the subject, but wanted to reach out again as we want to make sure we validate this scenario well. Therefore, here is an updated request: If you are using Public Folders…


Sent Items behavior control comes to Exchange Online user mailboxes

It has been a while since we blogged about the ability to control the behavior of Sent Items for shared mailboxes when users either send as or on behalf of shared mailboxes. Today, we are glad to share with you that this feature is currently rolling out for User mailboxes also! What does that mean…


Announcing the availability of modern public folder migration to Exchange Online

We are happy to announce the availability of public folder migration from Exchange Server 2013/2016 on-premises to Exchange Online! Many of our customers asked us for this, and the full documentation is now here. To ensure that any version-specific instructions are addressed appropriately, we have two articles to point you to: Use batch migration to…


Multi-Factor Authentication for the Hybrid Configuration Wizard and Remote PowerShell

You can now use an Administrator account that is enabled for Multi-Factor Authentication to sign in to Exchange Online PowerShell and the Office 365 Hybrid Configuration Wizard (HCW). In case you are not aware, the Azure multi-factor authentication is a method of verifying who you are that requires the use of more than just a…


An update to "Important notice for Office 365 email customers who have configured connectors"

Since we posted this blog post, we have received positive responses from many of our customers, who have proceeded with changing their connectors (as per instructions in the post), thereby protecting their email/domain reputation. However, we are also aware of customers who are either in the midst of making this change or need some additional…