250 Hello - Exchange Online

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The Way Things Were–EOP IP Ranges October 2018

Posted on 3rd February 2022 by Rhoderick Milne [MSFT]

When discussing network configuration for Office 365, there will be a series of issues and challenges that need to be addressed. Ideally this is all done in a proactive manner, with the final items addressed in the POC phase.

One of the cornerstone issues is around how access to and from Office 365 will be managed. This has to address end user access from workstations and publishing your on-premi… Read the rest “The Way Things Were–EOP IP Ranges October 2018”

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Office 365 Autodiscover Lookup Process–Revisited

Posted on 12th January 2022 by Rhoderick Milne [MSFT]

Previously we looked at the Office 2010 client and how it used Autodiscover to detect Exchange Online (EXO) mailbox settings. Outlook 2010 is no longer supported, so it is worth updating these notes for a current build of Outlook.

As with the previous post, this is intended as a point in time reference as I personally find it handy as an ongoing reference. In the updated example below a fully patc… Read the rest “Office 365 Autodiscover Lookup Process–Revisited”

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Add Domain to Azure, What Is Its EXO Status?

Posted on 26th October 2021 by Rhoderick Milne [MSFT]

Add Domain To Azure AD - What Is The Domain Type in Exchange Online

A recent discussion revolved around adding domains to Azure, and how that would manifest iteslf in Office 365 and Azure. This was a customer where one set of admins was focused on Azure and others on Office 365 and they did not interact much.

Lab Starting Configuration

You will note that initially there are three domains shown in Exchange Online portal. One is a custom vanity domain - tailspintoys… Read the rest “Add Domain to Azure, What Is Its EXO Status?”

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Exchange Online Transport Rule Audit

Posted on 27th September 2021 by Rhoderick Milne [MSFT]

This is a topic that still comes up when doing email investigations. After there has been an issue, we want to perform analysis to determine what may have happened any potentially why certain security controls did not act the way we expected.

With email one example would be around the audit information collected when an Exchange Online transport rule acts upon a message.

It is common to see that ad… Read the rest “Exchange Online Transport Rule Audit”

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Exchange Online App-Only Authentication Error AADSTS70011 Invalid Scope

Posted on 17th May 2021 by Rhoderick Milne [MSFT]

As more people are starting to use the Exchange Online V2 module (yay!), there are some new and different issues appearing.

In this case, the command to connect to the tenant was failing when App-Only authentication was used. A certificate was installed onto the machine where PowerShell was running.

The command used is shown followed by a glorious error.

Error Acquiring Token:
System.Exception:… Read the rest “Exchange Online App-Only Authentication Error AADSTS70011 Invalid Scope”

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TenantOrganizationConfig Required When Preparing Active Directory

Posted on 10th May 2021 by Rhoderick Milne [MSFT]

When running /PrepareSchema in an Exchange organisation with an existing Exchange Hybrid deployment you may run into an error which states:

"A hybrid deployment with Office 365 has been detected. Please ensure that you are running setup with the /TenantOrganizationConfig switch"

This is shown below:

A similar issue will occur if you specify only /PrepareAD

Note that the /TenantOrganizationConfig switc… Read the rest “TenantOrganizationConfig Required When Preparing Active Directory”

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Exchange HCW Detects “Wrong” Version

Posted on 2nd November 2020 by Rhoderick Milne [MSFT]

When running Exchange setup or the Exchange Hybrid Configuration Wizard (HCW), I always recommend looking at the version information that is shown on screen. This is part of the gross error check to make sure that the correct version is being used.

This habit is one of the recommendations made in the Mistakes to Avoid Installing Exchange CU post.

Sometime you still may see something that surprises yo… Read the rest “Exchange HCW Detects “Wrong” Version”

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Office 365 Welcome Pages – Circa 2015

Posted on 24th April 2020 by Rhoderick Milne [MSFT]

The below are some of the older Office 365 welcome pages, thought it might be fun to make the screenshots available for reference. They are from an old blog post that never made its way out of the draft folder. So it was repurposed for this post.

I used to call this one the California Highway

Once signed in, the Office 365 admin portal is shown below.

Cheers,

Rhoderick

&… Read the rest “Office 365 Welcome Pages – Circa 2015”

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EOP Connectors – Old and New

Posted on 31st October 2017 by Rhoderick Milne [MSFT]

This post is a reference for the future. It shows the older EOP connectors that were created by the Exchange Hybrid Configuration Wizard (HCW) and then the format of the newer connectors. Note that the names etc. will likely be changed again at some point in the future - change is inevitable.

This is how things looked in late 2017 / early 2018.

EOP Connector Names - Circa 2015

The connector below w… Read the rest “EOP Connectors – Old and New”

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Reminder–End of Office 365 Outlook Anywhere Support October 31st 2017

Posted on 25th October 2017 by Rhoderick Milne [MSFT]

The end of Outlook Anywhere support in Office 365 is almost upon us. In a weeks time support for Outlook Anywhere (OA) will be removed in Office 365. Note that this does not impact on-premises deployments. This change is in Office 365. The replacement client connectivity protocol is MAPI/HTTP. MAPI/HTTP is not a new protocol, it was introduced with Exchange 2013 SP1 and Outlook 2013 SP1.

The Of… Read the rest “Reminder–End of Office 365 Outlook Anywhere Support October 31st 2017”