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How are you trying to change Global Navigation?
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Dear Walter, <br />
I go to the top page, then go to Site Information, View all site settings, Look and Feel, Navigation, then I check off Show subsites and Show pages under Structural Navigation for Global Navigation. &nbsp;When I click OK to save, I get &quot;Sorry, you don't have access.&quot; and I get to request it. &nbsp;I have approved myself, since I am admin and approver many times, but nothing changes. &nbsp;I am also the owner of the site collection.
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Dear Experts,<br />
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I am the Admin for Site collection created on on-prem SharePoint 2019, and since I started to work on it, I have made myself the owner, primary admin, approver, etc. of this site collection, which was not created by me, but now it is under my care.<br />
Even though I am able to edit the site itself,I am not able to change the Global Navigation settings, even though when I perform the Permission check, &nbsp;I have the appropriate rights. &nbsp;This affects everything below, so that I am unable to update any subsites, or their navigation that are inherited from the top. I ended up requesting for access, then approving myself, still no change. &nbsp;The server has the most recent updates, and has been rebooted.<br />
I have gotten into SharePoint Central Administration site, and checked, and am not able to find anything else that I can do.<br />
How can I remedy this situation? &nbsp; Please advise.
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Dear Experts,

I am the Admin for Site collection created on on-prem SharePoint 2019, and since I started to work on it, I have made myself the owner, primary admin, approver, etc. of this site collection, which was not created by me, but now it is under my care.
Even though I am able to edit the site itself,I am not able to change the Global Navigation settings, even though when I perform the Permission check,  I have the appropriate rights.  This affects everything below, so that I am unable to update any subsites, or their navigation that are inherited from the top. I ended up requesting for access, then approving myself, still no change.  The server has the most recent updates, and has been rebooted.
I have gotten into SharePoint Central Administration site, and checked, and am not able to find anything else that I can do.
How can I remedy this situation?   Please advise.

Global Navigation settings cannot be changed

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.