featured Archives - Microsoft 365 Security

Every outage has its learnings…

by Michael Van Horenbeeck | May 9, 2019 | Blog, Other | 0 |

Early May 2019, Microsoft suffered from an outage which left many customers unable to connect to...

Protecting your AD FS environment from password (spray) attacks (in an Office 365 context)

by Michael Van Horenbeeck | Dec 20, 2018 | ADFS, Blog, How-To's, Identity, Office 365, Other | 0 |

Recently, I attended the Thrive Conference in Ljubljana, Slovenia. During the IT Pro “Ask the...

New hybrid Organization Config Transfer-feature (OCT) announced

by Michael Van Horenbeeck | Jun 19, 2018 | Blog, Office 365, Other | 0 |

Yesterday, Microsoft announced the Organization Config Transfer feature (OCT) in the Hybrid...

How to leverage (multiple) migration endpoints to speed up migrations to Exchange Online

by Michael Van Horenbeeck | Apr 5, 2018 | Blog, Office 365, Other | 0 |

Last week, at Microsoft’s Tech Summit in Amsterdam, I gave a talk about running Exchange...

Microsoft releases new “Tenant Restriction” capability

by Michael Van Horenbeeck | Feb 2, 2017 | Blog, Office 365, Other | 0 |

A few days ago, Microsoft announced the General Availability of the “Tenant...

“Conference season” is about to start!

by Michael Van Horenbeeck | Sep 23, 2016 | Blog, Events, News, Other | 0 |

Every year in September, right after the summer holidays, there is an unofficial start of a new...

Exchange Virtual Directory HTML Report

by Michael Van Horenbeeck | Sep 12, 2016 | Blog, Exchange, Other, PowerShell | 34 |

Update 12/09/2016: script updated to version 1.8: Included support for Exchange 2016 CU2+ Made...

A closer look at the “Minimal Hybrid Configuration” option

by Michael Van Horenbeeck | Jul 18, 2016 | Blog, Exchange, Hybrid Exchange, Office 365, Other | 2 |

Just a few weeks ago, Microsoft announced a new feature in its line-up of hybrid Exchange...

Exchange Hybrid Deployments and cross-premises Full Access permissions

by Michael Van Horenbeeck | Feb 22, 2016 | Blog, Exchange, Hybrid Exchange, News, Office 365 | 5 |

Nothing but excellent news in the hybrid Exchange realm these days! Microsoft recently updated the...

Selective authentication for (sub-)domains in Office 365

by Michael Van Horenbeeck | May 28, 2015 | Blog, Identity, Office 365 | 0 |

Office 365 provides various authentication options, such as cloud-IDs, Password Hash Synchronization or federated identities. Leaving out the specifics on how each of these options work, all of them are configured per domain. Whenever trying to access services in Office 365, the user is required to authenticate using its User Principal Name. For sake of simplicity, the general advise it to configure the UPN to match the email address which makes it less confusing for them.