Exchange and the LegacyExchangeDN Problem
Sep07

Exchange and the LegacyExchangeDN Problem

KB ID 0001468 Problem Why do we have the Exchange LegacyDN? It’s a throwback, from a time when we had our users, and our mail users in different databases. Below you can see the ExchangeLegacyDN for this Exchange on-premise user; /O=First Organisation/OU=Exchange Administrative Group (FYDIBOHF23SPDLT)/cn=Recipients/cn={something-user-specific} Who cares? Well they are still important, if you send an internal email (to someone in...

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Forward Mail From Exchange (On-Prem) To Office 365
Sep06

Forward Mail From Exchange (On-Prem) To Office 365

KB ID 0001467 Problem WARNING: Do not do this, if you are carrying out a Hybrid migration to Office 365! I’ve been doing an On-Prem to Office 365 migration recently. It was a little unusual because the ‘on-prem’ Exchange was not in the clients domain. So rather than migrate all the mail to their domain, and them migrate it to Office 365  we chose to use a third party migration solution ODME (Quest On Demand Migration...

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Exchange 2016 / 2013 Manage Remotely via PowerShell
Aug30

Exchange 2016 / 2013 Manage Remotely via PowerShell

KB ID 0001465 Problem Since Exchange 2013 we have been able to manage Exchange remotely through the Exchange Admin Center, but what if you want to use the Exchange Management Shell remotely? Install Exchange Management Tools This is not just the Management Shell, this will also install the Toolbox and additional help. There are few prerequisites, but to install from a normal PowerShell prompt; Enable-WindowsOptionalFeature -Online...

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Exchange Update / Install Error: The Error Code Is 8224
Jul28

Exchange Update / Install Error: The Error Code Is 8224

KB ID 0001451 Problem I saw this error while attempting to install an update on Exchange 2010, but it can be seen on all flavours of Exchange. This is the ‘gist’ of the error; Organization Preparation Failed Error: The following error was generated when "$error.Clear(); install-ExchangeSchema -LdapFileName ($roleInstallPath + "Setup\Data\"+$RoleSchemaPrefix + "schema0.ldf") " was run: "There was an error while running...

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Exchange: “BuildToBuildUpgrade” Error
May12

Exchange: “BuildToBuildUpgrade” Error

KB ID 0001436 Problem In the middle of an Exchange upgrade I got a bit stuck with the following error; “Setup previously failed while performing the action “”BuildToBuildUpgrade” You can’t resume setup by performing the action “Install”. There are a couple of variations on this error as well, you can also see either of the following; “Setup previously failed while performing the action “Install” You can’t resume...

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Exchange Update Fails: ‘Cannot find Arbitration Mailbox’
May11

Exchange Update Fails: ‘Cannot find Arbitration Mailbox’

KB ID 0001435 Problem Last night was a late one, Exchange 2016 update (CU9) failed to install and left the server in an unusable state. Relevant Part(s) of the Error -----Output Removed For the Sake of Brevity-----         $name = "SystemMailbox{bb558c35-97f1-4cb9-8ff7-d53741dc928c}"; -----Output Removed For the Sake of Brevity-----         Write-ExchangeSetupLog -Info ("Cannot find arbitration mailbox with name=$name.");           }...

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