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Archive for the ‘Exchange’ Category

Last Error: Message deferred by categorizer agent.

Exchange 2013 mail flow issue. It turned out to be the Malware agent causing the issue Once it is enabled and the Exchange transport service is restarted, all emails are stuck in the submission queue with “Last Error: Message deferred by categorizer agent.” Check the mail queue Get-Queue -Identity submission Get-Transport Agent will list all […]

Exchange ActiveSync iOS Device

Updated: May 2021 iOS devices unfortunately do not register with ActiveSync or other tools with a logical clear human-readable version number. Instead, they show up with strings like “Apple-iPhone3C1/902.206”   Obviously, this makes discovery and reporting difficult.  To help ourselves, and the community at large, we now maintain this list of hardware and iOS versions for […]

Email spoofing

The goal of email spoofing is to trick the user into thinking an email is from a known and trusted source. Spoofing is done through the manipulation of email elements that are visible to the recipient, primarily the “Body From” field. A spoofed email can be partial or full: Partial Spoof: A partial spoof occurs when […]

Cannot send large messages via ActiveSync, iPhone/iPad

SYMPTOMS When sending from a Mobile device via the ActiveSync service the device fails to send. Some devices may return an error indicating that “The message that was sent to the server was rejected because the message was too large”. (Apple iPad iOS). Not all mobile devices behave this way and may just keep the message […]

Enable Automatic Replies, Out Of Office, for another user or additional mailbox

Admin Method 1: Exchange PowerShell If you are an Exchange administrator, then using the Set-MailboxAutoReplyConfiguration Exchange PowerShell command is the supported and native way to go to enable Automatic Replies without logging on to the mailbox itself. Set-MailboxAutoReplyConfiguration -Identity <username> -AutoReplyState Enabled -InternalMessage “Internal auto-reply message.” -ExternalMessage “External auto-reply message.” Admin Method 2: Exchange Admin Center Another way to […]

MS Exchange email won’t download on iPhone

I can’t seem to download emails on my iPhone, can sign into OWA and get it working on any version on Outlook, but it won’t download email on iPhone. I’m able to successfully configure the email on phone but when I go into the mail app, and try to download the emails, I get an […]

Exchange PST Export

Before you can export PST you will need to have mailbox Import/Export role Add to Mailbox Import Export role New-ManagementRoleAssignment -Role “Mailbox Import Export” -User “<user name or alias>” Now you can use the command below to export pst New-MailboxExportRequest -Mailbox <user> -FilePath \\<server FQDN>\<shared folder name>\<PST name>.pst   I have multiple organisation, therefore I need […]

Get All Users Outlook/Inbox Rules in Office 365

Get All Users Outlook/Inbox Rules in Office 365 Description:  PowerShell cmdlet to view inbox rules is Get-InboxRule. First grab all mailboxes in the organisation and store the UserPrincipalName in a variable.  Here we are storing it in a variable called “Users” Then for each user we are going to get the InboxRule and select several attributes: MailboxOwnerID Name Description […]

Exchange Server 2013 and 2016 Standard Edition can’t mount databases that are larger than 1024 GB

Applies to: Exchange Server 2013 Standard EditionExchange Server 2016 Standard Edition This issue occurs because the default database size limit for Exchange Server 2013 Standard Edition and Exchange Server 2016 Standard Edition is 1,024 gigabytes (GB). There is no default database size limit for the Enterprise Edition. The Exchange store checks database size limits periodically and dismounts […]