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The only solution I can think of is to simply enable version control. However, if they are hitting that file at exactly the same time, and that is precisely what needs to happen, then even version control will not keep that from happening. All you can do is track changes from one doc to another, but the real way of safeguarding the integrity of a file is to lock it (which is why 'checking out a document' exists. <br />
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Is this for financial purposes? Meaning, is Excel the best medium for this? When multi-user access is required, I usually have to start thinking mySQL or similar solution, so transactional data and differences are 'built-in'.
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The only solution I can think of is to simply enable version control. However, if they are hitting that file at exactly the same time, and that is precisely what needs to happen, then even version control will not keep that from happening. All you can do is track changes from one doc to another, but the real way of safeguarding the integrity of a file is to lock it (which is why 'checking out a document' exists.

Is this for financial purposes? Meaning, is Excel the best medium for this? When multi-user access is required, I usually have to start thinking mySQL or similar solution, so transactional data and differences are 'built-in'.

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I have a shared document (excel) on our sharepoint portal. &nbsp;I have this excel web access part on several pages ans want the ability to have people edit it simultaneously.<br />
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Is this even possible? Or can only one person check out or edit the file at a time? &nbsp;Is there any other suggestion that you can think of to allow access to a file from different people at the same time or is that simply not possible?
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I have a shared document (excel) on our sharepoint portal.  I have this excel web access part on several pages ans want the ability to have people edit it simultaneously.

Is this even possible? Or can only one person check out or edit the file at a time?  Is there any other suggestion that you can think of to allow access to a file from different people at the same time or is that simply not possible?

Best practices for opening a single document on sharepoint by multiple people

Microsoft Sharepoint is a software platform and family of software products used for collaboration and web publishing combined. These capabilities include developing web sites, portals, intranets, content management systems, search engines, wikis, blogs, and other tools for business intelligence and collaboration. SharePoint has a Microsoft Office-like interface, and it is closely integrated with the Office suite.

Microsoft SharePoint

VMware, a software company founded in 1998,  was one of the first commercially successful companies to offer x86 virtualization. The storage company EMC purchased VMware in 1994. Dell Technologies acquired EMC in 2016. VMware’s parent company is now Dell Technologies.

VMware has many software products that run on desktops, Microsoft Windows, Linux, and macOS, which allows the virtualizing of the x86 architecture.  Its enterprise software hypervisor for servers, VMware vSphere Hypervisor (ESXi), is a bare-metal hypervisor that runs directly on the server hardware and does not require an additional underlying operating system.