How to use Office 365 Message Encryption to protect emails sent externally

Email encryption provides additional layer of information security by making sure only intended recipients can read messages. If you are looking for a user-friendly email encryption solution for your Microsoft 365 organization, there is a native tool for that – Office 365 Message Encryption. From the user’s perspective, it is the easiest to use: it can be configured so that it does not require any additional actions on their part. From the recipient’s perspective, this form of email encryption works seamlessly with Microsoft 365 accounts and offers an intuitive experience for all other email clients and email service providers. Read on to learn how to create a Microsoft 365 sensitivity label and use it in a transport rule to encrypt emails and files.

How to encrypt Office365 emails sent externally
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Manage inbox rules in Office 365 and Outlook on the web

Inbox rules in Office 365 (or Microsoft 365, if you like the newer name better) help users and admins make Outlook a better place. They can be employed to fight distractions, get things organized, block unwanted correspondence or automatically forward selected emails. With the never-ending onslaught of information that flows into Outlook, they are invaluable. In this article, I’ll show you how to work with Office 365 inbox rules using PowerShell.

Manage inbox rules in Office 365 with PowerShell
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How to create a no-reply mailbox in Microsoft 365

No-reply email addresses are useful in many scenarios, like sending notifications from transaction systems, shipping progress information, etc. In the case of such messages, you do not expect any user feedback and most of them are generated and sent automatically.

Even though you cannot stop users from sending emails to a no-reply address, you can create a mailbox which will block all incoming traffic, meaning you will not have to monitor it.

How to create a no-reply mailbox
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Mailbox size in Microsoft 365 (Office 365)

Microsoft 365 (or to be more precise, Exchange Online) has certain mailbox size limits. Those limits depend on two variables: the subscription plan assigned to the mailbox and the mailbox type. This article shows what the maximum mailbox size is, how to increase mailbox size, how to check the current mailbox usage for all mailboxes and what to do to prevent mailboxes from reaching their size limit. You may find it useful if you’re planning to migrate from on-premises Exchange Server to Microsoft 365.

Mailbox size in Microsoft 365 (Office 365)
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What to do if you cannot create an app password in Microsoft 365

Some applications and services for Microsoft 365 (for example, Skype for Business) use app passwords as an authentication method when multi-factor authentication (MFA) is enabled. The problem is that after enabling MFA for the organization, some or even all users may not be able to create and use app passwords. This article shows what you can do if you find out that app passwords are not working in your Microsoft 365 tenant.

Cannot create app password in Office 365
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How to send an HTML message in reply to a plain text email

If you have ever received a plain text email, you will know the message format will remain the same when you reply to it or forward it. Because of that, you won’t be able to add hyperlinks, formatting and images to your email. What’s more, instead of your carefully designed HTML email signature, the recipient will just see its simple plain text version. Fortunately, with some minor setup, you can reply to plain text emails using HTML format messages in Outlook or in other email clients. What’s more, you can force the HTML format in every email sent from your organization.

How to reply to plain text email in HTML format
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How to create and manage Microsoft 365 security groups

Microsoft 365 security groups, formerly known as Office 365 security groups, allow admins to easily manage access to e.g. SharePoint sites by grouping together users that require identical permissions. This way you only need to assign access once for the entire group, not for each user individually. In this article, we will show you how to create a security group as well as add and remove members from this group using Microsoft/Office 365 admin center and how to streamline the process using PowerShell cmdlets.

Creating and managing security groups
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How to set up out of office replies in Office 365

[Update]: This blog post was updated on June 4, 2021.

Out of office messages in Office 365 (let’s assume Office 365 = Microsoft 365, to make things easier) are an extremely useful thing. Not everyone knows though that this simple automatic reply is more than just an email. In this article, I’ll quickly go over the basics: what out of office message in Office 365 is and how to set it up for your account. For the real treat, I’ll show the easiest way to set up an out of office reply for another user (or all users).

Out of office in Office 365
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End of Mainstream Support for Exchange 2016

End of Mainstream Support for Exchange 2016 is planned for October 13, 2020. It means that 5 years after its release, this on-premises server enters the Extended Support period. The end of extended support (or end of life) for Exchange Server 2016 is planned for October 14, 2025. Read on to learn how this affects you, what to do next and what will be the last on-premises Exchange version.

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Blocking basic authentication in Office 365 (Microsoft 365)

The article was updated on February 25, 2021

Due to the Covid-19 pandemic, there was a huge change of plans concerning disabling basic authentication in Microsoft 365 (for connections to Exchange Online). The complete shutdown has been postponed indefinitely. While it gives organizations much more time to prepare, it’s a good idea to get tenants ready before the actual deadline. Continue reading this article to learn more about basic authentication in Microsoft 365, how to block it on your own and when exactly it will be disabled.

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