Multiple users working in the same document and same time.

7 years went from this complain, and still people can't collaborate on files!! Hello, its 2021 and collaboration is crucial!!! 

Your apps are generaly the most expensive compare to competiton, yet least functional in terms of collaboraiton. I am sure google, microsoft or apple will come with something soon! Please, I would pay even more just so I can enjoy collaborative tools, as well as more intuitive workspace. Note to say, that files from Indesign dont even show up in Creative cloud app. Only online.

Great

So Adobe is obviously not going to integrate this feature into InDesign anytime soon, but I have minor workaround that will work in one-on-one situations: screen sharing. It sounds like an almost barbaric way to achieve live collaboration compared to what we truly need but it's great when you're trying to work through layout design or even copy edits with a colleague. Macs have an easy way to do this baked in (even turns on the microphone so you can chat while you work remotely with someone) and I'm sure there are third party solutions for PCs. It will even let you grant the other user permission to control your screen, too, so you can both actually work together—you just have to be working on the same section of the document is the catch. I'm on a small team and will often use this while we're in the same room so we don't have to huddle around a single computer when working on a document. Being on the same network makes screen sharing particularly snappy, though it still works well remotely.

Other than that—while I design, whoever is writing will usually periodically open the doc, take a look, and close it without saving so as not to create conflicted copies. Or they might copy a section of the doc and paste it into an editor, make revisions, and later paste it back in when I'm not working on it. Written down like this I'm sure it sounds like a huge pain, but when it's all you know you don't really think about it. If you're a huge team you need InCopy, but if you're a small team you can get by with limited workflows like this.

It's not the best solution, but it's one that works in particular situations.

Our company uses vjoon K4 along with InDesign CS6 and InCopy CS6. I love the integration of CC, but our tech guys say we can't upgrade because of K4. Is there a workflow where designers and editors can collaborate on files by checking them in and out like K4, but can use CC?

It's pretty poor that InDesign doesn't support collaborative/simultaneous editing. Cheaper less 'feature-rich' software has this support and in 2016 i feel that it is a must for serious software. 

I would love to know when Adobe looks to implement this. I understand that it is no easy feature but it is something that is required and overdue. 

Come on Adobe, be a market leader, not a market follower. 

Let me attempt an answer.

Short answer, no. Multiple users cannot edit a the same file at the same time.

You'll need a content management system, to enable check in/check out, prevent overwrites etc. But (there's always a but), Creative Cloud offers several workflows and tools that can be used to help streamline multi-user publication workflows.

Using Creative Cloud will ensure that all users will be on the same version of the software, and there won't be any accidental lockouts due to format changes, and no need to run arounf to get the document downsaved. All users also have access to the latest features as soon as they become availble.

For products, such as books and magazines: InDesign needs to be the primary software that you use. When you design the content architecture of your publication, you can employ the following techniques and tools:

• Break up your publications into several INDD files, let's say for file for each story.
• Compile the individual files into an InDesign book.
• Link Ps and Ai or other files when you place them in the InDesign layout. That way whenever a designer updates an asset, InDesign will notify you that a linked file has changed and you can choose to update the link.
• InCopy was recently added to the Creative Cloud. Authors can can edit stories without actually having to open the InDesign files. For details see the InCopy help. InCopy has several workflows that can help out in this kind of setup.

Other than the Creative Cloud apps, you'll also need to setup folder and directory structures on the shared storage location.

• Setup a shared location/drive so that all users have access to the linked files.
• Control read/write access to individual files using the OS commands on the file directory/server. For example, Layout designers only have edit permissions on the layout (indd files); while Photographers can only edit .psd files, and so on. For small teams this might not be necessary, but for larger teams this may help.
• You could also consider storing your files using a Content Management System. You'll need to evaluate the cost and benefits properly.

Hope this helps.