解决OneNote同步速度慢的方法有很多，本文提供一种思路。
用记事本打开下述文件
C:\Windows\System32\drivers\etc\hosts

将下面代码复制到文件底部

#通用
13.107.42.12 d.docs.live.net
13.107.42.12 docs.live.net

#Onedrive客户端
13.107.42.12 api.onedrive.com
13.107.42.12 public.bn.files.1drv.com
13.107.42.12 public.dm.files.1drv.com
40.90.136.163 skydrivesync.policies.live.net
157.55.109.230 skydrivesync.policies.live.net
40.77.224.8 skydrivesync.policies.live.net
104.74.21.118 oneclient.sfx.ms
23.1.189.37 oneclient.sfx.ms
23.56.30.148 oneclient.sfx.ms
52.114.88.20 mobile.pipe.aria.microsoft.com
52.114.132.73 mobile.pipe.aria.microsoft.com
52.114.77.33 mobile.pipe.aria.microsoft.com
40.90.136.166 storage.live.com
157.55.109.226 storage.live.com
40.90.136.1 storage.live.com
52.242.211.89 skydrive.wns.windows.com
52.139.250.253 skydrive.wns.windows.com
40.90.189.152 skydrive.wns.windows.com


#Onenote UWP客户端
52.109.132.2 contentsync.onenote.com
52.109.48.2 contentsync.onenote.com
52.109.44.3 contentsync.onenote.com
52.109.48.0 www.onenote.com
52.109.2.10 www.onenote.com
52.109.44.1 www.onenote.com
23.57.112.187 c1-onenote-15.cdn.office.net

常见问题：无法读取修改文件的权限
解决方法：将hosts文件拖到桌面上，修改之后再拖回文件夹中。