In my Exchange lab I have been experimenting with Cipher Suite lock down and closing holes in SSL. Here are a list of items that we went through: IIS Crypto check and configure. SSL Labs website check. SSL Certificate check and validations. Strict Transport Security – IIS Firstly, I downloaded IIS Crypto 2.0 from Nartac […]
In your Exchange environment, mailbox moves are a normal routine for an administrator, however on the odd occasion you do have 1 or 2 that fail, below is a failure of a mailbox move: “Error: Mailbox XXXXX tombstone is present in the target database. It must be cleaned up before the move operation can proceed.” […]
Strange one in Exchange 2016. A Mailbox server was running for a while at a customer, tried to add the server to a DAG but it just failed. Decided to check a few things and on the Exchange Admin Center (EAC) I noticed it said no roles on the server in question. Launched the Exchange […]
As an Exchange Admin, you have deployed Exchange 2016 in your environment. The time comes for testing and you find that you are unable to setup an IMAP account as it fails when trying to send the email on the final step: “The account ‘Domain\Account’ provided valid credentials, but it does not have submit permissions […]
In any Exchange organization, it is common to add and remove mailbox databases, especially the default ones Exchange creates with the install. Generally when you want to remove a mailbox database you would need to move any mailboxes, arbitration mailboxes, archive mailboxes, plans, etc. however in Exchange 2016 there is one more. If you try […]
In Exchange 2016, you can harden access to the Exchange Admin Center (EAC) by creating a rule/s in IIS. To do this you will need to add an additional feature to IIS called “IP and Domain Restrictions”. This can be done from Server Manager and selecting “Add Roles and Features” as shown below: Once installed, […]
In Exchange 2016, after you have done your installation and all says successful, you login to the Exchange Management Shell and are presented with the following error: Rebooting the server does not help. Checked the PowerShell virtual directory and Basic plus Windows Integrated Authentication was set to $True. Lastly, you need to check your bindings […]
In one of my previous posts we covered installing Exchange Server 2019 on Windows Server 2016/2019 Full desktop, in this article we will cover installing Exchange Server 2019 on Windows 2019 Core. In Azure, Microsoft have the preview OS available for Server 2019 where I installed this. The basics are the same, In Azure you […]
In my test environment, I have multiple versions of Exchange, Exchange 2010, 2013 and 2016. Exchange 2010 and 2013 log event ID 2080 for the Topology with no errors. All Domain controllers are visible and can be contacted, however a strange error seems to be happening on the Exchange 2016 Servers. Event ID 2080 is […]
In your Exchange 2016 environment, you might have noticed the following Event (Event ID 9646) being logged: Mapi session (redacted) with client type MoMT exceeded the maximum of 32 objects of type Session To resolve this issue, you can create a registry key on the server and then restart the Exchange Information Store. HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\MSExchangeIS\ParametersSystem\Maximum Allowed […]
