Our small-to-medium-sized company has about 50 employees, with roughly 30 affected by the change. We have relied on an aging IMAP mail server for decades, while everyone uses Outlook as their mail client. As the company grows, we want to move to a modern hosted provider.
The main options are Microsoft 365 and Google Workspace. Employees currently use a mixture of Excel and Google Sheets, but some business processes genuinely require the desktop version of Excel. Google Workspace seems stronger for sharing and browser-based collaboration, while Microsoft 365 would let employees keep using Outlook and the familiar Office applications. I'm concerned about the training and disruption involved in moving long-time Outlook users to Gmail, as well as the effort of migrating decades of mail from IMAP.
For a company in this situation, which platform would you choose? What should we investigate before committing, especially around licensing, administration, migration tools, and preserving contacts, calendars, rules, and historical mail?
4 Answers
Google Workspace is worth considering if the company wants to become browser-first and collaboration is more important than preserving the existing desktop workflow. Its administration and shared-document experience can be simpler, and users can still access mail through Outlook if that is only a transitional requirement.
That said, the real question is whether the Excel-dependent processes are limited to ordinary spreadsheets or rely on macros, add-ins, complex formatting, external data connections, or other desktop-only features. Audit those files and workflows before deciding. If several important processes need full Excel, Microsoft 365’s integration will probably outweigh Google’s simpler collaboration model.
Microsoft 365 seems like the lower-risk choice here because your users already know Outlook and some work genuinely depends on desktop Excel. You can mix licenses instead of giving everyone the same plan: use a lower-cost web-focused plan for people who only need browser Office, and desktop-app licenses for the users who need full Excel and Outlook. Upgrade only the seats that later need advanced device management or security features.
The biggest risk is not choosing the provider; it’s the old mail data. Inventory mailbox sizes, archived mail, local PST files, contacts, calendars, and client-side rules before setting a migration date. A basic IMAP migration generally copies email, but it won’t automatically bring over everything stored locally in Outlook. Pre-stage the mailboxes, test with your two largest accounts, and perform a final synchronization during the cutover.
There are good arguments for Google Workspace, particularly if the organization is already comfortable with browser-based tools and wants fewer desktop applications to manage. Some companies find the administration experience much simpler. But moving decades-long Outlook users to Gmail and replacing Excel-heavy workflows can create a large training burden.
Given your current environment, Microsoft 365 is the pragmatic starting point. It reduces the number of changes employees experience at once while still giving you cloud storage, collaboration, security controls, and a path toward stronger device management. Make the decision based on audited business workflows rather than general claims that one administration console is easier.
Don’t treat this as only an email-hosting decision. Separate the mail migration from the office-suite evaluation. Both services can import mail from IMAP, but you should run a realistic pilot first and confirm how the migration handles interruptions, large folders, duplicates, and very old messages.
Also plan the user transition carefully. Document mailbox sizes, shared mailboxes, forwarding, aliases, retention needs, mobile devices, contacts, calendars, and Outlook rules. A weekend MX-record cutover can work, but only after mail has been preloaded and users know which items will need to be recreated. Either platform can work, but changing email, office software, and user habits simultaneously creates most of the pain.
A staged rollout is usually safer than moving all 30 users at once. Start with a few representative employees, including someone with a large mailbox and someone with complicated Excel files, then adjust the migration plan before the wider cutover.
Mixing licenses is useful, especially if only a few people need advanced Excel features or desktop applications. It also avoids paying for the most expensive plan across the entire company.