Tag: Azure AD

  • Forcing re-authentication on (some) applications

    Sign-In Frequencies in Azure AD: You might have seen on Azure Active Directory a new feature called Sign-In Frequency. In this post we are taking a closer look at this feature. First, we need to understand how authentication works and which tokens we are receiving. When you sign-in to an application which is dependent on…

  • F5 Big-IP & AAD & BASIC / NTLM

    In our previous post we looked at using Azure AD to perform the authentication for our F5 published web apps that used Kerberos. Now the strength of the F5 APM module is the SSO capabilities that allow it to authenticate users once and then they could reach any web app published by it, regardless of…

  • F5 Big-IP & AAD & KCD

    The title being full of acronyms, this topic is about publishing Kerberos based websites behind an F5 load balancer, while using Azure AD as the authenticating service. Or in more technical terms, F5 will rely on an external SAML based token to perform Kerberos Constraint Delegation towards a backend server. Get settled in, this is…

  • ImmutableID – mS-DS-ConsistencyGuid – AADConnect – ADMT – part 3b

    In part 3a, we explained how ADFS can be used in cross-forest migrations to ensure all users (migrated or not) can still authenticate. In part 3B we will be looking at Pass-Through authentication and how it affects migrated/non-migrated users. First of all, we need to make sure we have pass-through authentication agents deployed. In my…

  • ImmutableID – mS-DS-ConsistencyGuid – AADConnect – ADMT – part 3a

    To continue our coverage of ADMT and AAD, part three of the series. I know I promised 3 articles, but given the amount of data, I’ll split part 3 (authentication) in a few more posts.. We have 1 AAD and 2 AD’s; FORESTOOT.local as the source and TARGET.local is still the target AD forest. There…

  • ImmutableID – mS-DS-ConsistencyGuid – AADConnect – ADMT – part 2

    In our previous post we explored the backend of Azure AD Connect and what happens in multi-forest scenarios. In this post we will be looking into the ADMT migration and the effects on the cloud accounts. The FORESTROOT domain has a user (smith@azureinfra.com) which has been assigned a full E5 license to Office 365. The…

  • ImmutableID – mS-DS-ConsistencyGuid – AADConnect – ADMT – new series

    My posts on the ImmutableID seem to continue attraction from all over the world, and thus, let’s continue the fun. In a new series of posts we will be looking at the influence of the ImmutableID and Cross-Forest Anchor (name given by me, not sure if it is the actual name for it) in an…

  • Even strong passwords are… stupid

    While this blog is mostly focused around passwords and how to ensure people can login, the new direction within Microsoft is to get rid of passwords. I can already feel the shock from many security officers reading this post, but hear us (eeuh Microsoft) out on this one. Passwords are by default unsecure, they require…

  • Azure AD Lockout configurations – avoiding AD account locks

    On Monday morning, the office opened, and everyone tried to login to their computers, however no-one seemed to be able to login. The helpdesk was quickly flooded with calls and it seems everyone’s account was locked-out. It could happen to almost every company that does not have a good policy on lockouts. Hackers try as…

  • ADLS: The portal is having issues getting authentication tokens….

    The portal is having issues getting authentication tokens for Microsoft_Azure_DataLakeStore a common error that happens under certain conditions and only if you did not read my previous post azure-data-lake-managing-data-access. In short, the error comes when the ADLS administrator has added your account to ADLS without adding the user to Azure AD (inviting you as a guest).…

  • AAD Pass-Through Authentication – SSO without ADFS

    There are multiple options for authenticating users against Azure AD. But until now, full support for SSO based logins was only possible using two options. Azure AD joined devices, or a local ADFS service to your on-premises Active Directory. The latter being the most used option it also had its problems, first of all you…

  • Azure B2B and internal applications

    Azure Active Directory released the functionality for B2B a few months ago. This new feature enables companies to extend their identity service as well as their applications beyond traditional borders. Say, you want to provide your vendor a mailbox in YOUR Office 365 tenant. That way the vendor can still read/write emails on behalf of…