Microsoft Learn moves faster than most practice question banks. While writing AZ-900 and DP-900 questions against the current skills outlines (July 20 and July 21, 2026), I kept running into answers that older material still teaches and that Microsoft's own pages now contradict. Here are six, each with the sentence from Microsoft Learn that settles it, read on October 5, 2026.
1. Azure Active Directory is Microsoft Entra ID
You probably know this one, but old questions still use the old name, and some options mix the two to confuse you.
"Capabilities or services formerly known as "Azure Active Directory" or "Azure AD" are branded as Microsoft Entra product family features."
On the exam, expect Microsoft Entra ID, Microsoft Entra Domain Services and Microsoft Entra Conditional Access.
2. Entra External ID is not the new name of Azure AD B2C
This one catches people out, because it sounds like the same rename.
"Is Microsoft Entra External ID a new name for Azure AD B2C? No, it's not a new name for Azure AD B2C."
External ID is a separate, newer product for customer and partner identities. Azure AD B2C still exists for current customers, but the same FAQ says that effective May 1, 2025, its P1 and P2 plans are no longer available to purchase for new customers. If a question describes a new consumer app that needs sign-up and sign-in, the current answer is External ID.
3. The TCO calculator has been retired
Many AZ-900 banks still ask you to choose between the pricing calculator and the Total Cost of Ownership calculator. The AZ-900 training module now says this.
"The Total Cost of Ownership (TCO) calculator has been retired."
The pricing calculator is the tool the module points to for estimating Azure costs.
4. Data Migration Assistant is retired
DP-900 questions about moving SQL Server to Azure used to end with "run the Data Migration Assistant". Its own overview page is now explicit.
"Data Migration Assistant (DMA) is retired from July 16, 2025."
The page sends you to the SQL Server to Azure SQL migration overview instead, where Azure Migrate handles discovery and assessment.
5. Azure Cosmos DB for PostgreSQL is on its way out
Older DP-900 material lists it next to the other Cosmos DB APIs. Its page now opens with a warning.
"Azure Cosmos DB for PostgreSQL is on a retirement path and no longer recommended for new projects."
The Cosmos DB APIs worth knowing for DP-900 are NoSQL, MongoDB, Table, Apache Cassandra and Apache Gremlin.
6. AI-900 is retired
Not a question topic, but a planning trap. Plenty of guides still suggest AI-900 as the next step after AZ-900. Its study guide now carries this notice.
"This exam was retired on June 30, 2026, at 11:59 PM Central Standard Time."
Why this matters on exam day
Microsoft writes the exam from the current skills outline, so an answer that was right two years ago can now be the distractor. When a practice question and Microsoft Learn disagree, trust Learn, and check the date on the page.
Practice
I put 30 free questions online for each exam, split by the official skill area weights, no signup. After each answer you get the sentence from Microsoft Learn that backs it, with the link.
Each comes from a set of 300, four full exams and a drill, as a PDF on Ko-fi for 12 euros (AZ-900, DP-900) or as a timed Udemy practice test course at 12.99 dollars until November 4 (AZ-900, DP-900). If you spot an answer that Learn contradicts, tell me in the comments.
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