GPT-5.6 in Microsoft 365 Copilot is another sign that Microsoft is moving Copilot from a useful assistant towards a more capable business productivity tool.
Microsoft has announced that OpenAI’s GPT-5.6 family of models is available in Microsoft 365 Copilot across Word, Excel, PowerPoint, Chat and Cowork. Microsoft says the newer model is designed to support stronger reasoning, more complete outputs and more complex multi-step work inside the Microsoft 365 apps many businesses already use every day.
For business users, this is not just another AI headline. It is a reminder that Copilot is becoming more powerful, and that businesses need to think carefully about how AI, data, permissions, security and user training fit together.
What has Microsoft announced?
Microsoft says GPT-5.6 is now available in Microsoft 365 Copilot across core Microsoft 365 experiences including Word, Excel, PowerPoint, Chat and Cowork.
The key message is that Copilot should be better at helping with more complex work. That includes moving from rough ideas to more complete drafts, helping with analysis, supporting presentation creation and assisting with tasks that involve multiple steps or sources of information.
Availability may vary depending on region, tenant configuration and Microsoft’s rollout schedule, so not every business will necessarily see the same experience at the same time.
Why this matters for business users
For many SMEs, Microsoft 365 Copilot is still being viewed as a “nice to have” tool. The arrival of more capable models such as GPT-5.6 changes the conversation.
If Copilot can produce stronger drafts, better summaries, richer presentations and more useful analysis, it may become more embedded in everyday work. Staff may start using it for emails, reports, meeting notes, spreadsheet analysis, proposals, presentations and internal planning.
That could save time, but it also means businesses need to be clear about how Copilot should be used.
Where GPT-5.6 may help inside Microsoft 365
The biggest practical benefit is likely to be in the apps users already know.
- Word: helping users create better structured drafts, rewrite content and improve business documents.
- Excel: helping users understand data, explore trends and work through more complex analysis.
- PowerPoint: helping users create stronger presentation drafts and organise information more clearly.
- Copilot Chat: helping users ask questions, summarise information and work across business content.
- Cowork: supporting more collaborative and multi-step work where Copilot helps users move from idea to output.
The important point is that this is not just about generating text. The value comes when Copilot can help users move more quickly from business information to a usable result.
Better AI still depends on good business data
More capable AI does not remove the need for good Microsoft 365 housekeeping. In fact, it makes it more important.
Copilot works with business content in Microsoft 365. If that content is messy, outdated, duplicated or shared too widely, the quality and safety of the output can suffer.
Before businesses rely more heavily on Copilot, they should review:
- SharePoint permissions;
- Teams and OneDrive sharing;
- external guest access;
- old or inactive data;
- administrator accounts;
- multi-factor authentication;
- Microsoft 365 backup and recovery;
- user training and acceptable-use guidance.
We covered the file access side in more detail in our guide on how to check who has access to your Microsoft 365 files.
Copilot is only as safe as the permissions underneath it
A key point for business owners is that Copilot does not magically fix poor permissions. If a user already has access to files, sites or information, Copilot may make it easier for that user to find and use that content.
That can be helpful when permissions are correct. It can be risky when they are not.
Before rolling out Copilot more widely, businesses should ask:
- Do users have access only to the files they need?
- Are old SharePoint sites still available to too many people?
- Are external sharing links still active?
- Are sensitive files stored in the right place?
- Are admin accounts protected properly?
- Is MFA enabled for all users?
For more detail on this, see our article on Copilot in SharePoint and why file permissions matter.
Security and governance should come before wider rollout
It is tempting to treat Copilot as a simple licence decision: buy licences, assign them to users and let people get started. That is not the best approach.
For most businesses, Copilot should be introduced with some basic governance. That does not have to be overcomplicated, but it should include clear answers to questions such as:
- Who should get Copilot first?
- What business tasks should it be used for?
- What data should users avoid putting into prompts?
- Who reviews permissions before rollout?
- How will users be trained?
- How will the business monitor security and adoption?
Microsoft 365 security basics still matter. MFA, account protection, conditional access, secure admin roles and backup planning all remain important. If you are not sure whether MFA is properly enabled, start with our guide on how to check Microsoft 365 MFA is enabled for all users.
What this means for SMEs
For SMEs, GPT-5.6 in Microsoft 365 Copilot is both an opportunity and a prompt to review the basics.
The opportunity is productivity. Users may be able to produce better documents, analyse information faster, create stronger presentations and reduce time spent on repetitive drafting and summarising tasks.
The caution is governance. The more useful Copilot becomes, the more important it is that Microsoft 365 is properly configured underneath it.
That means businesses should not only ask “Should we buy Copilot?” They should also ask “Is our Microsoft 365 tenant ready for Copilot?”
Where Microsoft 365 backup and archive fit in
AI adoption also links to data management. If a business has years of old SharePoint content, inactive Teams, duplicated files and unclear retention rules, Copilot may surface information that is outdated or no longer useful.
Some data should remain active. Some should be archived. Some may need retention controls. Business-critical data should also be protected with a proper recovery plan.
We recently covered this in our article on Microsoft 365 Archive and what it means for business data, storage and recovery.
Where a Technology MOT can help
If your business is considering Microsoft 365 Copilot, a wider KES Technology MOT can help identify whether the foundations are in place.
This can include reviewing Microsoft 365 security, backup, user access, admin roles, file sharing, licensing and general IT resilience before new AI tools become part of day-to-day work.
Where KES can help
KES helps businesses get practical value from Microsoft 365 without ignoring security, backup and governance.
If you are considering Microsoft 365 Copilot, or you already have Copilot licences, it is worth reviewing your setup before relying on it more widely. That includes permissions, MFA, backup, admin access, data structure and user guidance.
Contact KES to discuss a Microsoft 365 review, Copilot readiness check or wider Technology MOT.
GPT-5.6 in Microsoft 365 Copilot FAQs
What is GPT-5.6 in Microsoft 365 Copilot?
GPT-5.6 is a newer OpenAI model family that Microsoft says is available in Microsoft 365 Copilot across apps such as Word, Excel, PowerPoint, Chat and Cowork. It is designed to support stronger reasoning and more complex work.
Will every Microsoft 365 tenant get GPT-5.6 at the same time?
No. Microsoft says availability can vary by region and tenant configuration, and Copilot features are usually rolled out gradually.
Does GPT-5.6 make Copilot safer automatically?
No. A more capable model does not replace good Microsoft 365 security. Businesses still need to review permissions, MFA, admin roles, sharing settings, backup and user guidance.
Should small businesses use Microsoft 365 Copilot?
Many small businesses may benefit from Copilot, but they should first check that their Microsoft 365 environment is properly secured, organised and backed up.
Can KES help with Microsoft 365 Copilot readiness?
Yes. KES can review Microsoft 365 permissions, security settings, MFA, backup, admin access and general readiness before wider Copilot adoption.
