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Understanding Which Accounting Software Integrates Best with Microsoft 365
Applies to: Microsoft 365, QuickBooks, Xero, FreshBooks
Article Type: Informational
Last Updated: 2026-07-21
Summary
If you run a business on Microsoft 365, you spend your day in Outlook, Excel, and Teams. When it's time to choose accounting software, you want a platform that "talks" to the tools you already use. This guide compares the three major accounting platforms based on how well they integrate with the Microsoft ecosystem.
Prerequisites
- None. This guide is for comparing platforms before purchasing.
Instructions
1. QuickBooks Online (Best Overall Ecosystem Integration)
QuickBooks is the undisputed heavyweight champion of small business accounting, and because of its massive market share, Microsoft treats it as a first-class citizen.
Microsoft Integrations:
- Excel: You can export almost any QuickBooks report directly to Excel with a single click, preserving formatting and formulas.
- Power BI: If your business is large enough to use Power BI, Microsoft offers a native connector to pull live QuickBooks data into your dashboards.
- Outlook: QuickBooks has a dedicated Outlook add-in that lets you view customer balances and create invoices without leaving your inbox.
Who it's for: Heavy Excel users and businesses that plan to hand their books over to a traditional CPA (virtually every CPA in the United States uses QuickBooks).
2. Xero (Best Modern API and Automation)
Xero is the massive global competitor to QuickBooks, known for being slightly more modern and having a better, cleaner user interface.
Microsoft Integrations:
- Excel via API: While it exports to Excel easily, Xero truly shines when connected to Microsoft Power Automate. Because Xero's API is modern and flexible, you can build automations (e.g., "When a new invoice is paid in Xero, send a message to a Microsoft Teams channel").
- Outlook Integration: Like QuickBooks, Xero offers an Outlook integration to surface customer data next to their emails.
- Document Management: Xero integrates nicely with SharePoint, allowing you to attach files stored in Microsoft 365 directly to Xero transactions.
Who it's for: Tech-savvy business owners who want to automate their workflows using Power Automate, or those who find QuickBooks too cluttered.
3. FreshBooks (Best for Solo Service Providers)
FreshBooks started as an invoicing tool and grew into accounting software. It is designed specifically for freelancers and service-based businesses (like consultants or designers).
Microsoft Integrations:
- Weakest Microsoft Ties: FreshBooks does not have the deep Excel or Power BI integrations of the other two. It relies on third-party tools like Zapier to connect to Microsoft 365.
- Simple Exports: You can still export your reports to CSV to open in Excel, but it is a manual process.
Who it's for: Solo Steves who care more about sending beautiful invoices and tracking time than they do about deep data integration with Microsoft 365.
4. How to Choose
If seamless integration with Excel and Outlook is your primary goal, QuickBooks Online is the safest choice because of its market dominance. Microsoft builds features for QuickBooks first.
However, do not choose accounting software solely based on integrations. You should pick the software that your CPA or accountant prefers. Ask them: "Do you prefer I use QuickBooks or Xero?" and buy whatever they say. It will save you thousands of dollars in accounting fees.
Troubleshooting
INFO
If you try to use an Outlook add-in for QuickBooks or Xero and get an error, your IT administrator may have blocked third-party add-ins for your Microsoft 365 tenant. You will need to ask them to "whitelist" the app in the Admin Center.
| Symptom / Error | Potential Cause | Solution |
|---|---|---|
| Excel formatting breaks when exporting from accounting software | CSV vs XLSX | Ensure you are exporting as an "Excel Workbook (.xlsx)" rather than a "Comma Separated Values (.csv)" file. CSVs do not preserve formatting. |