Script to fix invalid characters for SharePoint synced share

I'm hoping for some help implementing a script that will rename files with characters that are invalid for SharePoint, in a synced file share that is accessed by everyone at an office.
Some background: I'm working for a small nonprofit that has a SBS 2012 server and a local domain with about 30 users. I'm the sole volunteer IT person here. We have a network file share on the server that everyone stores their documents on. Recently,
we signed up with Office 365 Online and I set up a SharePoint library and synced it with the document share on our server. A few files aren't being uploaded, though, because of invalid characters (For instance, a file like "Outline/Team plan #3.doc"
Expecting everyone to remember not to use any of the invalid characters isn't really a solution, particularly since I'm not here full-time if things go wrong. I'm looking for a script to run on the server every few minutes that will rename any incompatible
files so that they can be uploaded to SharePoint. Personally, I think it's just plain criminal that Microsoft hasn't provided this functionality itself (it's the least they could do) but that's another rant for another time. Unfortunately, while
I do have a couple of years of experience with basic server administration and group policy, I'm not experienced at all when it comes to PowerShell scripting. I can string together some command line commands in a batch file, and that's about it.
I did find this promising post here:
http://community.spiceworks.com/scripts/show/2097-fix-file-names-for-skydrive-pro-syncing
I was hoping for opinions - is this the sort of thing I'm looking for, and what would be the best way to implement it (eg, every few minutes as a scheduled event)? Also, is this a straight-up powershell script, or are there additional languages/resources
involved? (Like I said, I'm sort of a script newbie).
Additional background: I posted a similar question asking if it could be done with GPOs, and they directed me here, suggesting it could be done with scripts.
Thanks!!

That script that Mike linked to is a good one, i've used it myself a fair few times. Just to weigh in with a bit of information on why those characters are forbidden:
The reason that some characters aren't allowed is that those characters are used as special characters in URLs. If you were to allow them to go into the file names (without 'escaping' them) then all the traffic to and from SharePoint would start to
go horribly wrong.
Now it is theoretically possible to build a tool that recognises the characters, escapes them, then uploads them. As well as updating the SharePoint interface to 'unescape' the characters when it renders them. However it's not a trivial bit of engineering,
you'd have to gut SharePoint and re-do some of the core behaviour. You've then got to re-test it and make sure it doesn't break any previous SharePoint behaviour.
The way MS want you to work is to save the files directly to SharePoint, which would pick up that you have protected characters and prompt the user to correct them. That does break down a bit with OneDrive as you can use the characters locally, it's only
the next step that fails...

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The Official Scripting Guys Forum
https://social.technet.microsoft.com/Forums/scriptcenter/en-US/home?forum=ITCG
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Dear Aries,
Dear Microsoft engineers
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http://community.office365.com/en-us/f/148/p/269514/825112.aspx
http://community.office365.com/en-us/w/do_more_with_office_365/onedrive-for-business-sync.aspx
http://community.office365.com/en-us/f/154/t/272927.aspx
http://community.office365.com/en-us/f/154/t/276237.aspx
http://community.office365.com/en-us/f/172/t/276477.aspx
http://community.office365.com/en-us/f/156/t/269853.aspx
http://community.office365.com/en-us/f/172/t/273549.aspx
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hello experts!
i am facing this error while activating 0vendor. data not available either in info object master neither in psa.
Error Message: Value 'KIRBY ' (hex. '004B004900520042005900A0') of characteristic 0SORTL contains invalid characters
Message no. BRAIN060
Diagnosis
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Hi Vijay,
after KIRBY is a characteristic value which cannot be interpreted by BW properply / is not in the valid char list.
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Axel

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Above record did not give any error but got the same error for another record.
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Issue:
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Summary:
The task fails when trying to access the file EXCEPT when the file does not exist. In that situation it can write the file but subsequently fails in accessing it again.

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May be it changes to others at run time.
The account runs the package not having access to all the folders in the path. Since you are moving the dtsx file from one server to the current server, do you also move the raw file to the same folder in the current server? Does the user runs the package
have access to all the folders in the path? To solve this, please ensure that the user has access to all folders and the raw file in the path on the current server.
Thanks,
Katherine Xiong
If you have any feedback on our support, please click
here.
Katherine Xiong
TechNet Community Support
Please see the response above. I can't use a message box on a server so I logged the values to the database. The resource account has full control to the folder. I haven't been able to get the DBA to check the SQL Agents permissions, but I was always under
the impression that if you use "Run As" on the task, it will not use the SQL Agent but the account you identify it to "Run As". The "Run As" account has full control on the folder and file.

Script to fix invalid characters for SharePoint synced share

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