"Notably absent: OneDrive, which could present an issue for some organizations. Users authenticate each connector individually, meaning ChatGPT (powered by GPT-5) only accesses data it is authorized to see. OpenAI says it's all encrypted and won't be used for training."
"However, OpenAI's corporate push has limitations. Unlike Microsoft's deeply integrated "Copilot All The Things" approach, ChatGPT's company knowledge mode must be manually selected for each conversation and can't search the web, create images, or generate graphs. Users must toggle it off to access those features. When disabled, ChatGPT might still use the connectors to answer questions, "but its responses won't include the same depth or detailed citations.""
Company knowledge connects ChatGPT Business, Enterprise, and Edu accounts to organizational data sources like Slack, SharePoint, Google Drive, Teams, and Outlook, while notably excluding OneDrive. Each connector requires individual user authentication so GPT-5 only accesses authorized data. Data is encrypted and excluded from training, and administrators can review conversation logs via the Enterprise Compliance API for reporting and regulatory compliance. Data residency support varies by connector. Company knowledge must be manually enabled per conversation, cannot search the web or generate images or graphs while enabled, and requires toggling off to regain those capabilities. ChatGPT Business pricing is $25 per user per month (annual) versus Microsoft 365 Copilot at $30.
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