Usually it’s to be done under Linux setup shell console (open command shell from installation environment) or it may be conducted via setup-GUI (not supposed in present topic).

Resize NTFS filesystem: ntfsresize /dev/<Windows partition (e.g. sda1)> -s <NEW SIZE (e.g. 128G)>

Recreate Windows partition: fdisk /dev/<disk to process (e.g. sda)>

Then, step by step:

1. p – check the Windows partition to resize (look HPFS/NTFS/exFAT partition with boot mark (*)), note Name and Start value
2. d – delete partition, number is the index after disk name (e.g. sda1 – partition number is 1)
3. n – new partition with the same first sector (Start) and the size as of resized filesystem (e.g. +128G)
4. t – change the partition type from default Linux to HPFS/NTFS/exFat – hex code 7
5. n – new swap partition for temporary storage of RAM content if needed (2xRAM size)
6. t – change the partition type from default Linux to Linux swap / Solaris – hex code 82
7. n – new partition for Linux (pick the favorite size or use the rest of unallocated space)
8. p – shows new partitions layout, double check if it’s all right
9. w – write out the changes

OK, get back to Linux installation and pick the Linux partition as root (/) and Linux swap as swap one mounting points.

BTW: In the case of Ubuntu LTS Server installation the mounting of swap partition leads to installer crash. Just miss the swap mounting then and add it later after system installation complete.