Microsoft 365 Apps for Business Review: Office Without the Mailbox

Fix it now

Microsoft 365 Apps for business is the Office suite on subscription with the tenant services removed: desktop and mobile Word, Excel, PowerPoint, Outlook, OneNote and Access on Windows, plus a terabyte of OneDrive. There is no mailbox, no Teams and no SharePoint. It exists for one situation: a business whose mail already lives somewhere else.

1. Buy it if mail runs on Google Workspace, an on-premises Exchange server or a hosting provider you have no intention of leaving.
2. Buy it if you want the applications kept current on subscription rather than buying a perpetual version every few years.
3. Buy it as a top-up where a few people need desktop applications and everyone else is fine in the browser.
4. Skip it if you need business email from Microsoft, because Business Standard is the same applications plus a mailbox, Teams and SharePoint.
5. Skip it for session hosts and non-persistent virtual desktops: Microsoft lists Apps for business as not including shared computer activation.
6. Check the SKU name on the quote. Apps for business and Apps for enterprise are different products with different rights and different ceilings.

It is sold for up to 300 users, the same ceiling as the rest of the Business family. Above that, Microsoft 365 Apps for enterprise is the equivalent product.

If that is your situation you can stop here. The rest covers deployment, the activation rules that decide how long it survives offline, and the two comparisons that most often change the answer.

Why it happens

The plan covers the desktop applications on Windows and Mac – Word, Excel, PowerPoint, Outlook and OneNote, with Access on PC only – plus the mobile applications, a terabyte of OneDrive for each user and the lightweight Visio for the web that Microsoft now includes with most commercial plans. Each user may install on up to five PCs or Macs, five tablets and five phones. These are the same builds the larger plans install, on the same update channels, with Current Channel as the default.

What is absent is everything that makes a tenant a tenant. No Exchange Online mailbox, so no mail hosting, no calendars in Microsoft’s cloud and no shared mailboxes. No Teams. No SharePoint sites. No Bookings, Forms, Planner or Loop. You still get an identity in Entra ID because a licence has to be assigned to somebody, and you get OneDrive, which is the one collaboration service included.

Outlook causes the most confusion. It installs because it is part of the suite, and it has no mailbox of its own to connect to; you point it at whatever mail system you already run. That is the ordinary configuration for this plan. Verify that your provider supports the connection method your Outlook build uses, and test calendar and contact synchronisation with a couple of real accounts before migrating a team, because that is where the rough edges live.

Activation is by sign-in and the licence is carried in the user’s profile. Microsoft’s own description of the mechanism is worth knowing before you deploy to anything unusual: the machine checks in daily or at sign-in, and as long as it reaches the internet at least once every 30 days the applications remain fully functional. Past 30 days offline they drop into reduced functionality mode until a connection returns. For a machine that is genuinely cut off, Microsoft’s recommendation is a volume-licensed Office LTSC release with KMS or Active Directory-based activation instead.

One limitation deserves a straight answer rather than the hedge these reviews usually give. Shared computer activation – the thing that makes Office work on Remote Desktop Session Hosts and non-persistent virtual desktops – is not included with Microsoft 365 Apps for business. Microsoft lists it as available with any plan that includes Microsoft 365 Apps for enterprise, any plan that includes the desktop Visio or Project applications, and Microsoft 365 Business Premium, and names Apps for business and Business Standard as not supporting it. If a session host is anywhere in your plan, this is the SKU that will not do the job.

The comparison that usually decides it is with Business Standard, which is the same applications with a mailbox, Teams and SharePoint added. The gap between them is smaller than people expect. If there is any prospect of moving mail to Microsoft within a couple of years, buying Standard now and leaving the mailbox unused is often cheaper than buying Apps now and Standard later.

Full reference

Where it sits against the alternatives

Deploying and managing it

• The Office Deployment Tool and its configuration file choose architecture, update channel, which applications to install and whether to remove earlier versions.
• Current Channel is the default for both Apps for business and Apps for enterprise; Monthly Enterprise Channel and Semi-Annual Enterprise Channel are the slower options.
• The Microsoft 365 Apps admin centre provides inventory and servicing information, and Group Policy templates are published for settings you want enforced centrally.
• Machines that spend long periods offline need watching: 30 days without a check-in puts the applications into reduced functionality mode.
• Access installs on Windows only, so a Mac user in the same tenant cannot open an Access database locally.

Licensing points that catch people out

1. The 300-user ceiling of the Business family applies here. Above it, Microsoft 365 Apps for enterprise is the equivalent product with no such cap and with shared computer activation.
2. The applications are licensed for commercial use, which the free web applications tied to a personal Microsoft account are not. That is why a business cannot simply tell staff to use free browser versions with their own accounts.
3. Mixing plans in one tenant is supported, so a firm can run Apps for business for a few desktop users and Business Basic for everyone else.
4. If mail moves to Microsoft later, the users move to Business Standard in the admin centre and keep their installations; nothing is reinstalled.
5. A perpetual licence remains legitimate for a fixed workstation kept for years, and we would rather say so than pretend the subscription always wins.

Before you standardise on it

• Price Business Standard beside it. The gap is often small enough that the mailbox is nearly free.
• Check for session hosts or virtual desktops in the environment, because those need Business Premium or an Apps for enterprise plan.
• Check who genuinely needs an installed application rather than the browser, because Business Basic covers the rest at a lower price.
• Ask what happens to the current mail platform in the next two years. Buying this plan is a bet that it stays.

Questions people ask about this