Issue Recently, I have come across an issue where external emails sent to a distribution group were being discarded for members which were external recipients. Emails to internal recipient members were being delivered successfully. For e.g. consider a client with domain @xyz.com having a distribution group called Sales@xyz.com with two members. John@xyz.com and vendor@gmail.com. When... Continue Reading →
Exchange 2016 Add-Ins: Unable to get from Office Store
I have recently come across an issue where users were unable to add Sales force Add-in using OWA 2016. When they tried to add an Add-in using Manage Add-in section on OWA using an option to get an app from Office store, they would get the following error. Most likely it's because of your firewall... Continue Reading →
View Lync Enabled Mailboxes Only
You want to get a list of mailboxes that have Lync enabled. When Lync is enabled for a mailbox, you get an additional address type i.e. SIP in the email properties of a mailbox. Following command will list all users along with their SIP addresses and if Lync is not enabled, SIP address would be... Continue Reading →
Steps to take prior to Installing Cumulative Update for Exchange 2010/2013/2016
I have come across the following issue post cumulative update for Exchange servers several times hence decided to share this with everyone. Web.config is a file that contains client specific limits for OWA, EWS , and Active Sync. When a cumulative update is installed, the web config file is overwritten and the limits that you... Continue Reading →
Taking Ownership of Office 365 Tenant
Let's assume that you have got a client named XYZ Services (xyzServices.com) that you need to set up an Office 365 tenant for. As per the client, they have never used Office 365 services before, they have been on some On-Prem Exchange. When creating a new tenant, you are required to enter the Tenant name... Continue Reading →
Mailbox and Distribution Access Permissions
There have been many instances where we get a request to find out which mailboxes if any does a specific mailbox has access to and what's the access level. And also to find out out which distribution group(s) is user member of. It's not easy to get this manually by checking the properties of each... Continue Reading →
Migrating On-Prem Users To Existing O365 Tenant With AD Connect Sync Already In Place
Let’s say you are in the process of migrating a client of yours to Office 365 from their on-premises environment where they are running Microsoft Exchange server. Normally, you would create a new tenant on O365 and then create the users on cloud only to be begin with. After creating users, you would start mail... Continue Reading →
Move AD Connect to a Different Server
There are cases where you have to move AD Connect to a different server and it’s a very simple process to do so. We can’t have more than one AD Connect syncing to O365. Please make sure you log on to AD Connect using global admin credentials. Install AD Connect on new server and enable... Continue Reading →
Outlook logon fails after mailbox moves from Exchange 2010 to Exchange 2013 / 2016
Recently, we moved few mailboxes to Exchange 2016 from Exchange 2010 and most of them did work but some of them we ended up recreating the profile and it worked. but some of them didn't work even after recreating the outlook profile. This was tested on Outlook 2010 SP2, Outlook 2013 and Outlook 2016. Errors... Continue Reading →
Azure AD / On-Premise AD Sync Immutable ID Issues
There has been instances where Azure AD complains about having duplicate UserPrincipalNames and / or duplicate accounts are created on O365 after running sync with on-prem AD. Before we dive into the fix, just want to give you some back ground as to what happens when you sync on-prem AD objects to O365. When you... Continue Reading →